diff --git a/Apps/Maps/CHANGELOG.md b/Apps/Maps/CHANGELOG.md
new file mode 100644
index 0000000..5b622f3
--- /dev/null
+++ b/Apps/Maps/CHANGELOG.md
@@ -0,0 +1,254 @@
+# Changelog
+
+## 0.4.0
+
+Offline navigation: routes for walking, cycling and driving, found on the device from the downloaded maps, with a
+preview and turn-by-turn following. Prepared tiles are split into smaller files, so maps open and label faster.
+
+**Navigation**
+- "Go" (Navigate here) on the sheet of a place, a house number, a waypoint and a point held on the map. The route
+ starts at your GPS position; without a fix the app asks: a point you tap (or the crosshair), the screen centre, or
+ the approximate Wi-Fi/IP position with its accuracy.
+- Modes Walk, Bike and Car as icons at the top of the route preview: one tap (or W, B, C) searches the same route
+ for another mode, also during a search. New routes start with Settings → Route mode. Car routes follow road
+ types only, without turn restrictions or access rules, and the card says so.
+- The map shows the whole route as a blue line with a white casing (a thick dark line on monochrome displays) and a
+ card with length, time and mode, and Start and Close. A failed search keeps the card with the reason.
+- Start: heading-up following with a bar for the next turn and the street ("In 120 m turn left onto ..."), the
+ distance and time left; passed parts turn grey. Off the route for 10 s: a new route from where you are. Within
+ about 25 m: "You have arrived".
+- The route is kept until Menu → Clear route, also across restarts. Menu → Show route and Stop navigation.
+- The road graph is made per z14 tile in idle time from the tiles on the card (a `.prg` next to each tile).
+- When the search runs out of memory it tries once more heading straight for the destination (the route may be a
+ little longer); only then do long routes stop with a message. On the T-Deck 47 of 50 Bratislava test routes on foot
+ and 48 of 50 by car are found (was 42 and 38).
+- The map no longer blinks while a route is searched: tiles around the screen are not drawn meanwhile.
+- Start and destination no longer snap to small pieces of road that lead nowhere for the mode (a car on a service road
+ in a pedestrian zone or on a one-way piece, a short path off the network): such searches read the whole city and
+ ended "too long" or "no route". A car may stop up to 500 m from the destination.
+- Key hints (the letters on the buttons, "Enter: change" in lists) only on boards with a keyboard that types:
+ found with Tactility's device discovery, so buttons (Wio Tracker) and a trackball alone no longer count.
+- While navigating your position sits low on the screen; the bar has an X to stop (Esc too), and the menu button is
+ below the bar.
+
+**Faster maps**
+- Prepared tiles are three files: geometry, labels and the routing graph. Drawing reads only the geometry (a dense
+ city tile 127 KB → 69 KB); labels are read when they are placed, house numbers only from z17, and only the parts
+ of a tile near the screen. Older tiles are split in idle time ("Splitting tiles"); they keep working meanwhile.
+- Label placement with POIs takes about half as long as before.
+
+**For developers**
+- Debug script commands `routebench`, `navigate`, `waitroute` and `replay` (a GPX track as positions, to test
+ following indoors). Host tools `graph_tiles` and `route_tiles`, and `host/routing/check_prg.py`, which compares the
+ device graphs with the PC study.
+
+## 0.3.0
+
+Points of interest and house numbers, a background work indicator, smoother turned maps, a smaller label font, and
+browsed tiles that move into a download instead of being fetched again. Needs Tactility main from November 2026
+(app data in `appdata/`).
+
+**Points of interest and house numbers**
+- Icons for cafés, shops, stops, stations, pharmacies, hotels, museums and about 120 other kinds of places, from
+ z15 (the most important from z14), with names next to them from z17. House numbers from z17. They follow the
+ Labels setting and never cover place or street names.
+- Tap or click a place or number for a sheet with its name, kind, coordinates, distance and bearing, and
+ "Save as waypoint". With keys: show the controls, then Enter picks the place nearest the crosshair in the
+ middle, and each next Enter the next nearest.
+- Map data from 0.2.0 is upgraded in place in idle time; no download is needed.
+
+**Background work**
+- A small amber dot in the top-left corner while the app prepares tiles, makes fonts, updates maps, imports GPX
+ files or moves browsed tiles. Tap or click it for a list of what runs.
+
+**Map**
+- A turned map is drawn smoothly (bilinear) once it stops moving; while it moves it stays fast.
+- Tiles fetched while browsing move into a region you download over them instead of being downloaded again. The
+ download screen says how many are already on the card.
+
+**Touch only**
+- Every function works with only a touch screen. On boards without a keyboard an on-screen keyboard opens with
+ every text field (new waypoint names, Rename), with Shift, digits and signs, and accented letters.
+- The download frame has a round < to leave it without downloading.
+- The card for tiles fetched while browsing shows only Close: they can't be paused or cancelled.
+
+**Downloads and background work**
+- Tiles of a download are prepared later, once the map was left alone for 10 s, not right after the download. Tiles
+ drawn on screen are still prepared at once.
+- When memory is short, preparing waits and tries again instead of giving up on the tile until the map reopens. The
+ tile cache and the render buffers make room for it, and get it back afterwards.
+- Tiles a download moved out of the browsed tiles are no longer reported as failed preparations.
+- Downloads use one connection instead of two: as fast on the T-Deck, without the TLS errors from running out of
+ internal RAM and the reconnects they caused, and with more internal RAM left for the rest of the app.
+- Tiles fetched for the screen while browsing are written to the card at once, not only once the map is left alone.
+- Tiles on screen no longer stay drawn from a coarser zoom level when PSRAM has no block large enough for their
+ data (low-zoom tiles are 300-450 KB before they are prepared). The tile cache makes room, or the tile is read
+ from the card a piece at a time; if neither works it is tried again a few seconds later.
+- A tile that was drawn around the screen and then came into view with coarser data is fetched in full detail.
+- The background-work dot is a solid dot without animation, and no longer flickers through the dimming of an
+ opened menu.
+
+**Label font**
+- The app's label font holds just the characters map names use, plus whole Latin, Greek and Cyrillic alphabets:
+ 39 KB instead of 80 KB. The sizes on the card are made again once after the update.
+
+**Tactility**
+- App data moved to `/sdcard/tactility/appdata/tactility.maps` with the new Tactility; the app moves anything
+ left in the old folder on first start.
+
+## 0.2.0
+
+Labels, map rotation and heading-up, plus menu, list, trackball and download fixes.
+
+**Labels**
+- Place, street, river, water and peak names, placed for each view so they never overlap; street names
+ follow the street and stay upright; a light halo.
+- Settings → Labels (Off / Few / Normal), Settings → Latin names (the Latin-script name where the map data
+ has one). Names in scripts the label font has no letters for (Japanese, Chinese, Arabic and others) always
+ show their Latin-script name.
+- Label fonts: the app ships a subset of Adwaita Sans with Latin (Extended-A and -B), Greek, Cyrillic and
+ Vietnamese letters, so names like Štefánikova, Łódź, İstanbul, Москва or Hà Nội show fully; the device
+ makes the fonts from it once (about 7 s in the background on first start) and keeps them on the card.
+- Map data downloaded with 0.1.0 is upgraded in place in idle time, the tiles on screen first; no download
+ is needed.
+
+**Rotation**
+- Q / E turn the map by 15°, N or the compass (top right, only shown on a turned map) turns it back to
+ north; two fingers turn it once twisted past 45° (15° when already turned), so pinching does not turn it
+ by accident.
+- ⌖ / G now cycles: follow north up → follow with the direction of travel up (from the GPS course while
+ moving faster than about 1 m/s, smoothed, held when slower) → not following.
+- Keys and dragging move a turned map in screen directions; labels stay upright; the download frame always
+ works north up.
+- On monochrome and e-paper displays turning is not animated.
+
+**Menu and lists**
+- Menu → Location switches Tactility's location service on or off (with a message).
+- Enter or a tap on a row opens its actions; lists have a back arrow and a check mark in their header,
+ swipe right goes back; lists open without a highlight until a key, the trackball or the encoder moves.
+- Menu names: Download map (Choose area, Choose region), Downloaded maps.
+
+**Trackball and touch**
+- The trackball works as a mouse pointer on every screen, with acceleration; Settings → Pointer speed
+ (Slow / Normal / Fast).
+- A click on the map shows or hides the controls; holding the button no longer opens the menu. Dragging a
+ list scrolls it.
+
+**Waypoints**
+- A sheet to name a new waypoint (hold the map, hold ⌖, P, or Menu → Add waypoint); typing replaces the
+ suggested name. All pins are the same size.
+
+**Downloads**
+- A progress pill with tiles and percentage, and a details card (tap the pill) with Pause, Resume and
+ Cancel, speed and time left.
+- Detail fetched while browsing: tiles no longer needed after you move on are dropped from the queue (the
+ one downloading finishes).
+- A download that fails (network or memory) tries again by itself after 30 s, up to 3 times; the message
+ stays 10 s.
+- A framed area is named after the nearest town's Latin-script name, so the lists can show it.
+- Framing an area a region already covers does not download it again: an unfinished region continues, a
+ finished one says so.
+
+**Fixes**
+- The map could stop responding for many seconds while big tiles loaded.
+- Zooming out kept a blank screen until tiles loaded (the previous map now stays, shrunk).
+- Browsing downloads continued after panning only after a zoom change.
+- The progress pill stayed after browsing ended.
+- A large low-zoom tile is read from the card once instead of once per zoomed-in tile.
+- Downloads failed late in a session: the large low-zoom tiles (over 1 MB) needed one free block of memory
+ that size. Tiles now download in 64 KB pieces, and the tile cache lends memory when even a piece does not fit.
+
+## 0.1.0
+
+Idle updates, named regions, waypoints, track recording and GPX files, plus smooth zoom.
+
+**Zoom**
+- + / −, I / O and double tap zoom smoothly (about a quarter of a second, around the screen centre or the
+ tapped point), then the sharp map appears. Pinch scales live as before.
+- Off on monochrome and e-paper displays, or with Settings → Smooth zoom off (renamed from Smooth pinch).
+
+**Regions and downloads**
+- Download area asks "This area" or "Choose region". Choose region lists continents, countries and regions
+ from Geofabrik's list, shipped with the app. "All of …" downloads a whole region.
+- The highest zoom level that fits OpenFreeMap's 3,000-tile / 50 MB limit is chosen automatically, with the
+ tile count, size and zoom shown before you confirm. Only tiles inside the region's outline are fetched.
+- Downloads get names: a chosen region its own name, a framed area the nearest town once downloaded. The
+ Regions screen shows the names; R renames (keyboard). Folders keep 8.3 names.
+- Outdated regions update quietly after about 30 s without input, one tile at a time, the tiles you look at
+ first, with an "Updating 42%" label. Any input pauses it and it continues later, also after a restart.
+ Only on Wi-Fi, and while charging or above 40 % battery.
+- Enter or tap on an outdated region offers "Update now". The region "browsed" is not updated.
+- HTTPS connections are kept open and shared, so a new download or browsing no longer pays a 2-3 s TLS
+ handshake each time.
+
+**Waypoints**
+- P, holding ⌖, Menu → Add waypoint, or holding the map on touch screens saves a waypoint. Named WP 001,
+ WP 002, …, shown as pins at every zoom level.
+- Tap a pin for name, coordinates and distance and direction from you. Menu → Waypoints lists them by
+ distance; Enter or tap goes there, R renames, Del or hold deletes after asking.
+- Kept in `waypoints.gpx` (GPX 1.1) in the app's folder on the card.
+
+**Tracks**
+- Menu → Record track: start, pause, resume and stop. A red ● with the time shows top right, with the
+ distance when the controls are shown.
+- Points every 5 m (or more than the GPS accuracy) or every 30 s while moving; approximate positions are
+ skipped. The track is drawn as a red line.
+- Written to `tracks/YYYYMMDD-HHMM.gpx` every 30 s, so a crash loses at most 30 s. "Recorded tracks" lists
+ the files with their folder.
+- Recording only runs while the app is open.
+
+**GPX files**
+- Copy `.gpx` files into `/sdcard/gpx`. Menu → GPX files shows or hides them.
+- Tracks blue, routes purple, waypoints as small dots. A compact `.gpc` copy is kept next to each file.
+ A 50,000-point track was tested on the PC, not yet on the device.
+
+**Trackball**
+- In mouse mode the pointer shows only while the controls or the menu are open, the button under it is
+ highlighted, and it hides after 3 s without movement.
+- A click brings it back, and a click on the map while the controls are hidden shows them.
+
+**Displays**
+- A black-and-white style for 1-bit displays: black roads with white edges, water and parks as sparse
+ patterns, outlined buildings, no grey. Checked in renders on the PC only.
+
+**Requirements**
+- Needs a board with 8 MB PSRAM for now.
+
+## 0.0.1 (proof of concept)
+
+The first public version: an offline vector map for Tactility, tested on the LilyGO T-Deck.
+
+**Map**
+- Fullscreen map drawn by the app with LVGL stopped. LVGL comes back on every exit.
+- OpenFreeMap vector tiles (OpenMapTiles schema) from the SD card: water, land cover and use, parks, buildings,
+ waterways, roads with casings, railways, boundaries and airports, anti-aliased.
+- Zoom 0-19. Levels above 14 are drawn from the z14 vectors, so they stay sharp.
+- Pan and zoom by keys (W A S D, I / O), trackball, drag, pinch, double tap and the + / − buttons.
+- Your position from Tactility's location service, with an accuracy circle, a direction arrow while moving and
+ follow mode (G or ⌖). The app never changes location settings.
+- Scale bar, and the attribution: shown in full for 5 s, then a © mark that opens it again and leads to
+ About and licences.
+- Hidden controls (☰, + / −, ⌖) that show with a tap, Space or a click, with key hints on keyboards and a
+ pointer for the trackball in mouse mode.
+- Opens at ESA ESTEC the first time, then where you left it.
+
+**Downloads**
+- Download area: a fixed frame in the middle, the map moves and zooms under it. A live tile count, size estimate
+ and the highest zoom that fits OpenFreeMap's 3,000-tile / 50 MB limit.
+- The downloader uses OpenFreeMap's TileJSON, 2 keep-alive HTTPS connections and its own User-Agent. Tiles are
+ written as `.tmp` and renamed. Downloads resume after a restart, areas share tiles, and the download stops at
+ 50 MB of real data.
+- Download while browsing: with Wi-Fi, tiles on screen that have no detail yet are fetched one at a time and kept
+ in the region "browsed".
+- Regions screen: size, date and status, with delete (tiles other regions use are kept).
+
+**Speed**
+- Prepared tiles (`.prt`) next to each `.pbf`: only what the style draws, quantised to 2048 units per tile,
+ deflated. About a fifth of the size, half the render time. Converted in idle time.
+- One I/O task for all SD card access, tiles on screen first. Two render lanes, a PSRAM cache of 32 rendered
+ tiles, and prefetch only after a second without input.
+- Cold first z14 screen in dense central Budapest: 1.8-2.0 s on the T-Deck (5.6 s in the first device build).
+
+**Known limits**
+- At most 3,000 tiles or 50 MB per download. No labels yet. Touch tested on the T-Deck only. No automatic
+ region updates yet.
diff --git a/Apps/Maps/CMakeLists.txt b/Apps/Maps/CMakeLists.txt
new file mode 100644
index 0000000..48e3904
--- /dev/null
+++ b/Apps/Maps/CMakeLists.txt
@@ -0,0 +1,13 @@
+# tactility-cmakelists-version: 1
+cmake_minimum_required(VERSION 3.20)
+
+if (NOT DEFINED ENV{TACTILITY_SDK_PATH})
+ message(FATAL_ERROR "TACTILITY_SDK_PATH environment variable is not set")
+endif()
+
+get_filename_component(TACTILITY_SDK_PATH "$ENV{TACTILITY_SDK_PATH}" ABSOLUTE)
+include("${TACTILITY_SDK_PATH}/TactilitySDK.cmake")
+
+tactility_project_pre(maps)
+project(maps)
+tactility_project_post(maps)
diff --git a/Apps/Maps/LICENSE b/Apps/Maps/LICENSE
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/Apps/Maps/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+ To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights. Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+ For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received. You must make sure that they, too, receive
+or can get the source code. And you must show them these terms so they
+know their rights.
+
+ Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+ For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software. For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+ Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so. This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software. The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable. Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products. If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+ Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary. To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+ The precise terms and conditions for copying, distribution and
+modification follow.
+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+ "The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+ To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy. The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+ A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+ To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+ To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+ An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+ 1. Source Code.
+
+ The "source code" for a work means the preferred form of the work
+for making modifications to it. "Object code" means any non-source
+form of a work.
+
+ A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+ The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+ The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work. For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+ The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+ The Corresponding Source for a work in source code form is that
+same work.
+
+ 2. Basic Permissions.
+
+ All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+ You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force. You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright. Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+ Conveying under any other circumstances is permitted solely under
+the conditions stated below. Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+ 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+ No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+ When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+ 4. Conveying Verbatim Copies.
+
+ You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+ You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+ 5. Conveying Modified Source Versions.
+
+ You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+ a) The work must carry prominent notices stating that you modified
+ it, and giving a relevant date.
+
+ b) The work must carry prominent notices stating that it is
+ released under this License and any conditions added under section
+ 7. This requirement modifies the requirement in section 4 to
+ "keep intact all notices".
+
+ c) You must license the entire work, as a whole, under this
+ License to anyone who comes into possession of a copy. This
+ License will therefore apply, along with any applicable section 7
+ additional terms, to the whole of the work, and all its parts,
+ regardless of how they are packaged. This License gives no
+ permission to license the work in any other way, but it does not
+ invalidate such permission if you have separately received it.
+
+ d) If the work has interactive user interfaces, each must display
+ Appropriate Legal Notices; however, if the Program has interactive
+ interfaces that do not display Appropriate Legal Notices, your
+ work need not make them do so.
+
+ A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+ 6. Conveying Non-Source Forms.
+
+ You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+ a) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by the
+ Corresponding Source fixed on a durable physical medium
+ customarily used for software interchange.
+
+ b) Convey the object code in, or embodied in, a physical product
+ (including a physical distribution medium), accompanied by a
+ written offer, valid for at least three years and valid for as
+ long as you offer spare parts or customer support for that product
+ model, to give anyone who possesses the object code either (1) a
+ copy of the Corresponding Source for all the software in the
+ product that is covered by this License, on a durable physical
+ medium customarily used for software interchange, for a price no
+ more than your reasonable cost of physically performing this
+ conveying of source, or (2) access to copy the
+ Corresponding Source from a network server at no charge.
+
+ c) Convey individual copies of the object code with a copy of the
+ written offer to provide the Corresponding Source. This
+ alternative is allowed only occasionally and noncommercially, and
+ only if you received the object code with such an offer, in accord
+ with subsection 6b.
+
+ d) Convey the object code by offering access from a designated
+ place (gratis or for a charge), and offer equivalent access to the
+ Corresponding Source in the same way through the same place at no
+ further charge. You need not require recipients to copy the
+ Corresponding Source along with the object code. If the place to
+ copy the object code is a network server, the Corresponding Source
+ may be on a different server (operated by you or a third party)
+ that supports equivalent copying facilities, provided you maintain
+ clear directions next to the object code saying where to find the
+ Corresponding Source. Regardless of what server hosts the
+ Corresponding Source, you remain obligated to ensure that it is
+ available for as long as needed to satisfy these requirements.
+
+ e) Convey the object code using peer-to-peer transmission, provided
+ you inform other peers where the object code and Corresponding
+ Source of the work are being offered to the general public at no
+ charge under subsection 6d.
+
+ A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+ A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling. In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage. For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product. A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+ "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source. The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+ If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information. But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+ The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed. Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+ Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+ 7. Additional Terms.
+
+ "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+ When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+ Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+ a) Disclaiming warranty or limiting liability differently from the
+ terms of sections 15 and 16 of this License; or
+
+ b) Requiring preservation of specified reasonable legal notices or
+ author attributions in that material or in the Appropriate Legal
+ Notices displayed by works containing it; or
+
+ c) Prohibiting misrepresentation of the origin of that material, or
+ requiring that modified versions of such material be marked in
+ reasonable ways as different from the original version; or
+
+ d) Limiting the use for publicity purposes of names of licensors or
+ authors of the material; or
+
+ e) Declining to grant rights under trademark law for use of some
+ trade names, trademarks, or service marks; or
+
+ f) Requiring indemnification of licensors and authors of that
+ material by anyone who conveys the material (or modified versions of
+ it) with contractual assumptions of liability to the recipient, for
+ any liability that these contractual assumptions directly impose on
+ those licensors and authors.
+
+ All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+ If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+ Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+ 8. Termination.
+
+ You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+ However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+ Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+ Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+ 9. Acceptance Not Required for Having Copies.
+
+ You are not required to accept this License in order to receive or
+run a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+ 10. Automatic Licensing of Downstream Recipients.
+
+ Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+ An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+ You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+ 11. Patents.
+
+ A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+ A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+ In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+ If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ Copyright (C)
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+.
diff --git a/Apps/Maps/README.md b/Apps/Maps/README.md
new file mode 100644
index 0000000..8213038
--- /dev/null
+++ b/Apps/Maps/README.md
@@ -0,0 +1,298 @@
+# Tactility Maps
+
+Offline vector maps for [Tactility](https://github.com/TactilityProject/Tactility) devices. The device
+downloads an area from [OpenFreeMap](https://openfreemap.org/) by itself and draws it fullscreen, with
+anti-aliased roads, water, parks and buildings, from tiles on the SD card.
+
+Version 0.4.0, tested on a LilyGO T-Deck (ESP32-S3, 8 MB PSRAM); it also runs on ESP32-P4. Changes are listed in
+[CHANGELOG.md](CHANGELOG.md).
+
+## Install
+
+Needs Tactility 0.8.0 or newer on an ESP32-S3 or ESP32-P4 board with 8 MB PSRAM, a FAT-formatted SD card, and Wi-Fi
+for downloading maps. Tested on Tactility 0.8.0-dev (main, November 2026) on a LilyGO T-Deck.
+
+1. Install "Maps" from Tactility's App Hub. Or copy the `.app` file to the SD card, open it in the Files app and
+ confirm "Install".
+2. Start "Maps" from the app list. The first time it opens at ESA ESTEC in Noordwijk with no map data yet: move
+ to your area, open the menu (M or ☰) and choose Download map.
+
+## How it works
+
+- Vector tiles (OpenMapTiles schema) are stored one file per tile in `maps////.pbf` on the SD card.
+- The map stops LVGL and draws with Tactility's `pixel_buffer` API, like the built-in Terminal app.
+- Tiles are inflated and decoded as a stream, never held whole in memory, and drawn with an exact-area
+ anti-aliasing rasteriser. Two render tasks (one per core) fill a PSRAM cache. Rendered tiles can also be
+ cached on the SD card (a setting, off by default).
+- Zoom levels above 14 are drawn from the z14 vectors, so they stay sharp.
+- Each downloaded tile also gets a prepared copy next to it (`.prt`): only what the style draws, with
+ quantised coordinates, grouped by draw order. It is about a fifth of the original's size and renders faster.
+ The original `.pbf` is never changed; it keeps names and house numbers for later features.
+- One task does all SD card reads and writes, tiles on screen first. Tiles around the screen are only
+ prepared after a second without input, and any input cancels them.
+- The position comes only from Tactility's location service. The app never changes location settings.
+- Menus, lists and dialogs are drawn by the app as well, LVGL stays stopped while the app runs.
+
+## Using the app
+
+**Map screen.** The map fills the screen. Always visible: your position (●, with an accuracy
+circle), the scale bar, and the © mark.
+
+| To… | Keyboard | Trackball | Touch |
+| --- | --- | --- | --- |
+| Move the map | W A S D | Roll | Drag |
+| Zoom in / out | I / O | — | Pinch, double tap to zoom in, or the + / − buttons |
+| Show / hide controls | Space | Click on empty map | Tap the map |
+| Centre on my position and follow | G | — | ⌖ button |
+| Stop following | Move the map | Roll | Drag |
+| Turn the map | Q / E | — | Two fingers |
+| Back to north | N | — | Compass button |
+| Open a row's actions | Enter | Click | Tap the row |
+| Add a waypoint | P | — | Hold ⌖ (your position) or hold the map (that point) |
+| A place or house number | Show the controls, then Enter (nearest the crosshair; Enter again: next) | Click it | Tap it |
+| Menu | M | Long click | ☰ button |
+| Download an area | Shift + D | — | Menu → Download map |
+| Leave the download frame | Esc | — | The round < in its top left corner |
+| Type a name (waypoint, rename) | Keyboard | — | On-screen keyboard |
+| Credits | — | Click © | Tap ©, tap again for About and licences |
+| Leave the app | Esc or Backspace | Menu → Exit | Menu → Exit |
+
+**Touch only.** Every function works with only a touch screen. On boards without a keyboard an
+on-screen keyboard opens with every text field (new waypoint names, Rename): letters with Shift (twice
+for caps lock), a 123 page with digits and signs, an ÁÉ page with the accented letters common in names,
+Del, Space and OK; the field moves up above it. Lists and menus scroll by dragging and go back with a
+swipe to the right or their <; the download frame has its own < to leave without downloading.
+
+**Controls.** Hidden by default. When shown: ☰ menu top left, + and − in the middle of the right edge, ⌖
+position bottom right above the scale bar. With a keyboard each button shows its key. ⌖ is filled while
+following, an outline when not, and crossed out when there is no position. With the trackball in mouse
+mode the pointer shows only while the controls or the menu are open, the button under it is highlighted,
+and it hides after 3 s without movement (a click brings it back). The pointer works on every screen and
+speeds up with movement; Settings → Pointer speed (Slow / Normal / Fast). A click on the map shows or
+hides the controls. On boards with buttons only (no keyboard, no touch),
+the buttons move the focus through the controls and press the focused one.
+
+**Zoom.** + / −, I / O and double tap zoom smoothly (about a quarter of a second, around the screen centre,
+or the tapped point for double tap), then the sharp map appears. Pinch scales live as before. This is off
+on monochrome and e-paper displays, or with Settings → Smooth zoom off (the setting was called Smooth
+pinch).
+
+**Rotation.** Q / E turn the map by 15°, N or the compass (top right, only shown on a turned map) turns
+it back to north. Two fingers turn it once twisted past 45° (15° when the map is already turned), so
+pinching does not turn it by accident.
+⌖ / G cycles: follow north up → follow with the direction of travel up (from the GPS course while moving
+faster than about 1 m/s, smoothed, held when slower) → not following. Keys and dragging move a turned map
+in screen directions; labels stay upright; the download frame always works north up. On monochrome and
+e-paper displays turning is not animated.
+
+**Labels.** Place, street, river, water and peak names are placed for each view so they never overlap;
+street names follow the street and stay upright, with a light halo. Settings → Labels (Off / Few / Normal)
+and Settings → Latin names (the Latin-script name where the map data has one). The app ships a subset of
+Adwaita Sans with Latin, Greek, Cyrillic and Vietnamese letters, so names like Štefánikova, Łódź,
+İstanbul, Москва or Hà Nội show fully; the device makes the fonts from it once (about 7 s in the
+background on first start) and keeps them on the card, made again once when a new app version brings a
+new font. The font holds the characters map names use (scanned from real map data of many countries) plus
+whole Latin, Greek and Cyrillic alphabets, 39 KB. Map data downloaded with an older version is upgraded in
+place in idle time, the tiles on screen first; no download is needed.
+
+**Places and house numbers.** Icons for cafés, shops, stops, stations, pharmacies, hotels, museums and
+about 120 other kinds of places, coloured by kind (food orange, shops purple, transport blue, health red,
+…), from z15 (stations, museums and the most important places from z14, benches and bins from z16), with
+their names next to them from z17 when there is room. House numbers in small grey text from z17. Both
+follow Settings → Labels (one zoom level later with Few) and never cover place or street names. Tap or
+click one for a sheet with its name, kind, coordinates, distance and direction, "Save as waypoint" (the
+name filled in) and Close. With keys: show the controls (a small crosshair marks the middle), then Enter
+opens the place nearest the crosshair and each next Enter the next nearest; Esc closes the sheet. Enter
+on the map without the controls still shows them. Icons: Maki by Mapbox (CC0).
+
+**Background work.** A small amber dot in the top-left corner shows while the app works in the
+background: preparing or upgrading tiles, making label fonts, updating maps, importing GPX files, moving
+browsed tiles into a download. It pulses on colour screens and is solid on monochrome and e-paper ones.
+It hides while the progress label or the controls show. Tap or click it for a card listing what runs.
+Not to be confused with the red ● of track recording.
+
+**Navigation.** Routes are found on the device from the maps you downloaded: no internet and no extra
+download. A place, a waypoint, a house number or a point you hold on the map opens a sheet with **Go**
+(Navigate here; key N or G on a place or waypoint). The route starts at your position when there is a GPS fix.
+Without one the app asks where it starts: **Choose on the map** (tap the start, or move the map and press Enter
+for the crosshair; Esc cancels), **Screen centre**, or **My position** when Tactility has an approximate position
+(Wi-Fi or IP based; its accuracy is shown, e.g. ±25 km). It is searched in the background; the map then shows the whole route,
+a bar with the three modes at the top and a card with its length, time and mode, and **Start** and **Close** (keys
+S, Esc).
+
+- **Modes:** Walk, Bike and Car, as icons at the top. Tap one (or press W, B, C, or 1, 2, 3; P goes to the next) to
+ search the same route for that mode, also while a search still runs. A new route starts with the mode set in
+ Settings → Route mode (Walk unless changed). When a search fails the card says why and stays, so another mode can
+ be tried. Walk uses every road and path and ignores one-way streets; Bike leaves out motorways and
+ trunk roads and keeps to one-way streets; Car leaves out paths, footways, steps and tracks and keeps to one-way
+ streets. Time estimates: walk 4.5 km/h, bike 15 km/h, car by road type (110 km/h on motorways down to 20 km/h
+ on service roads).
+- **Car routes follow road types only**, without turn restrictions or access rules (the map tiles have
+ neither): the card says so. Check signs.
+- **Start** follows the route: the map turns with your direction (heading up), your position sits low on the screen
+ so you see further ahead, and a bar at the top shows the next turn with an arrow and the street, e.g. "In 120 m
+ turn left onto Štefánikova", and below it the distance and time left. The X at the right end of the bar (or Esc)
+ stops navigating; the menu button is below the bar. The route ahead is blue, the part you passed grey. More than 40 m off the route for 10 seconds:
+ "Off route — recalculating", and a new route from where you are (at most every 20 s). Within about 25 m of the
+ destination: "You have arrived"; following stops and the line stays.
+- **Start and destination** snap to the nearest road the mode may use within 200 m (500 m for a car: the last bit is
+ on foot), leaving out small pieces of road that lead nowhere for that mode, such as a service road inside a
+ pedestrian zone for a car.
+- **The route stays** until Menu → Clear route, also after leaving the app. Menu → Show route shows it and its
+ card again; Menu → Stop navigation stops following.
+- **Limits:** a search may use about 2.5 MB of memory (less when the map holds more). When the memory runs out it
+ tries once more with a search that heads straight for the destination, which may give a slightly longer route;
+ only if that fails too, very long routes (across a big city, corner to corner) stop with "Route too long for this
+ device; try a shorter one". Routes are found only where the tiles were
+ downloaded at the highest detail (z14) and prepared: right after a download the app first prepares the new
+ tiles in idle time (the amber dot). Without a road within 200 m of the start or the destination, or without
+ a connection between them in the downloaded map, the app says so.
+
+**Menu:** Download map, Downloaded maps, Waypoints, Add waypoint, Record track, GPX files, Location, Settings, About and
+licences, Exit. W/S, trackball or finger to move; Enter, click or tap to choose; Esc, Backspace or tap
+outside to close.
+
+**Lists and actions.** Enter or a tap on a row opens its actions; lists have a back arrow and a check
+mark in their header; swipe right or the back arrow goes back, and dragging a list scrolls it. Lists open
+without a highlight until a key, the trackball or the encoder moves.
+
+**Downloading:** open Download map. It asks "Choose area" or "Choose region". "Choose area" keeps the frame
+in the middle; move and zoom the map under it. The bar shows tiles, size and max zoom, and updates live.
+Enter, click or Download starts it; Esc cancels. It downloads in the background and resumes after a
+restart; areas share tiles. Tiles you already looked at while browsing are not fetched again: they move
+from "browsed" into the new region (the bar says e.g. "1240 tiles, 310 already on the card"); a browsed
+tile from an older map build is downloaded fresh.
+
+**Choose region** lists continents, countries and regions, from Geofabrik's region list shipped with the
+app. Enter or tap opens a region's parts; the first row "All of …" downloads the whole of it. The app
+picks the highest zoom level at which the whole region fits OpenFreeMap's limit of 3,000 tiles or 50 MB,
+and shows the tile count, size and zoom level before you confirm. Only the tiles inside the region's
+outline are fetched.
+
+**Downloaded maps:** list with name, size, date and status (complete, downloading, outdated). Select with W/S,
+trackball or tap; delete with Del then confirm, or long press then Delete; R renames (needs a keyboard);
+Esc goes back. Enter or tap on an outdated region offers "Update now". Deleting keeps tiles another
+region still uses.
+
+**Region names:** a new download gets a name: a chosen region its own name; a framed area the name of the
+nearest town in its map data once it has downloaded (before that, the smallest region of the list it lies
+in). Downloaded maps shows the names. The folder on the card keeps a short name (8.3).
+
+**Browsing:** with Wi-Fi, tiles on screen that have no detail on the card yet are downloaded while you
+look at them (a small "Downloading map" label shows) and kept in the region "browsed", so they work
+offline later. Without Wi-Fi a short message says that detail is missing here. Only the tiles on screen
+are fetched, one at a time.
+
+**Settings:** SD card cache on or off, prepared tiles deflated or raw, smooth zoom on or off, download
+while browsing on or off. Defaults: SD card cache off (switched off, its files are deleted in idle time),
+deflated, on, on. The map opens at ESA ESTEC, Noordwijk, the first time, then where you left it.
+
+**Updates:** OpenFreeMap rebuilds its map about weekly. A region downloaded from an older build shows
+"outdated" in Downloaded maps. After about 30 s without input the app updates outdated regions quietly, one tile
+at a time, the tiles you look at first; a small "Updating 42%" label shows meanwhile. Any key, touch or
+trackball movement pauses it, and it continues later, also after a restart. Only on Wi-Fi, and only while
+charging or above 40 % battery (boards that report no battery: Wi-Fi alone decides). Enter (or tap) on an
+outdated region in Downloaded maps offers "Update now". The region "browsed" (tiles fetched while browsing) is
+not updated.
+
+**Position:** comes from Tactility's location service (GPS or approximate). Menu → Location switches
+Tactility's location service on or off, with a message. If it's off, the ⌖ button is crossed out and
+pressing it says how to enable it in Tactility's settings.
+
+**Waypoints:** P, or holding ⌖, saves a waypoint at your position; Menu → Add waypoint saves one at the
+map centre; on touch screens holding the map saves one where you hold. A sheet asks for the name of a
+new waypoint; typing replaces the suggested name. Waypoints are named WP 001, WP 002, …; they show as
+pins at every zoom level, all the same size. Tap a pin for its card: name, coordinates and distance and
+direction from you. Esc closes the card. Menu → Waypoints lists them by distance: Enter or tap goes
+there, R renames (keyboard), Del or hold deletes after asking. They are kept in `waypoints.gpx` (GPX 1.1)
+in the app's folder on the card.
+
+**Track recording:** Menu → Record track → Start recording. A red ● with the time shows top right (with
+the controls shown also the distance). The same menu entry pauses, resumes and stops. Points are taken
+from the position when you moved more than 5 m (or more than the GPS accuracy), or every 30 s while
+moving; approximate positions (from the network) are skipped. The track is drawn on the map as a red
+line. It is written to `tracks/YYYYMMDD-HHMM.gpx` every 30 s, so a crash loses at most 30 s, and a file
+left open is closed the next time the app starts. Recording only runs while the app is open (background
+recording would need Tactility support; that is a question for later). "Recorded tracks" in the same menu
+lists the files with their folder, so they can be copied off the card.
+
+**GPX files:** copy `.gpx` files into the folder `gpx` at the top of the SD card (`/sdcard/gpx`). Menu →
+GPX files lists them; Enter or tap shows or hides one. Tracks are drawn blue, routes purple, waypoints
+as small dots. A file is read once and a compact copy (`.gpc`) is kept next to it, so it shows quickly
+next time. Files that are not GPX show an error and are skipped. Large tracks were tested on the PC (50,000 points
+read in about 40 ms there), not yet on the device.
+
+## OpenFreeMap's rules
+
+OpenFreeMap is free and needs no key. Its [terms of service](https://openfreemap.org/tos/) for offline downloads
+are enforced in the app:
+at most 3,000 tiles and 50 MB per download (the highest zoom level that fits is chosen, the download also
+stops at 50 MB of real data), at most 4 parallel requests (the app uses 2), and a User-Agent that names the
+app. The tile URL is read from OpenFreeMap's TileJSON. openstreetmap.org tile servers are never used.
+
+## Known limits
+
+- One download is at most 3,000 tiles or 50 MB (OpenFreeMap's terms). In dense cities that is only a few hundred
+ z14 tiles, for example the centre of Budapest. Larger areas need several separate downloads, which you start
+ yourself.
+- Labels show no characters outside Latin, Greek, Cyrillic and Vietnamese. Names in other scripts (for
+ example Japanese, Chinese or Arabic) show their Latin-script name instead, where the map data has one.
+- Heading-up needs movement (no magnetometer: the course comes from GPS).
+- Not yet tested outdoors with GPS.
+- Touch, keyboard and trackball were tested on the LilyGO T-Deck only. Other boards, boards without PSRAM and
+ monochrome or e-paper displays are untested.
+- 1-bit displays get their own black-and-white style, so far checked only in renders on the PC, not on a 1-bit device.
+- The trackball in mouse mode is only lightly tested.
+- Recording stops when the app closes (background recording would need Tactility support).
+
+## Credits
+
+- Map data: [OpenStreetMap](https://www.openstreetmap.org/copyright) contributors, available under the Open
+ Database License (ODbL).
+- Vector tile schema: [OpenMapTiles](https://openmaptiles.org/).
+- Tiles served free of charge by [OpenFreeMap](https://openfreemap.org/), see its
+ [terms](https://openfreemap.org/tos/).
+- Region outlines © OpenStreetMap contributors, from Geofabrik GmbH (download.geofabrik.de), ODbL 1.0.
+- Built for [Tactility](https://github.com/TactilityProject/Tactility).
+- Label font: Adwaita Sans, under the SIL Open Font License 1.1; see [THIRD_PARTY.md](THIRD_PARTY.md).
+- Place icons: [Maki](https://github.com/mapbox/maki) by Mapbox, CC0 1.0.
+
+## Attribution
+
+The full "© OpenMapTiles © OpenStreetMap contributors" shows for 5 seconds when the map opens and then
+collapses to a small "©" mark in the bottom left corner. Tapping or clicking it shows the text again for 5
+seconds, tapping the text opens "About and licences", which is also in the menu. This follows the OSMF
+attribution guidelines for small screens.
+
+## Building
+
+Needs ESP-IDF 6.1 and the Tactility SDK matching the firmware on the device.
+
+```
+python /tt.py app build
+python /tt.py app install --host
+python /tt.py app run --host
+```
+
+The PC build (`host/`, CMake) renders tiles to PNG and runs the unit tests:
+
+```
+cmake -S host -B host/build
+cmake --build host/build --config Release
+host/build/Release/render_tile 47.4979 19.0402 14 640 480 out.png
+host/build/Release/tests
+host/build/Release/prepare_tiles [--write] [--deflate] [--zoom 16]
+host/build/Release/ui_preview