Your files on every screen. Send them so they can't leak.
Google Play (closed beta). Join the tester group at nosus.foo/beta, then opt in here: play.google.com/apps/testing/foo.nosus.app.
Direct APK. Download app-release.apk from Releases. Check it before you install:
sha256sum app-release.apk
apksigner verify --print-certs app-release.apk| v1.7.1 APK SHA-256 | 8acf9710734ada055071c97840509318200a2c4ebd80956d566197ca36ad49a2 |
| Signing certificate SHA-256 | 9b4ca036eae243470ec4ff7d6105c2ab73d568360c7d297c679ea9303656f1af |
The APK hash changes every release (each release page lists it next to the file). The certificate never changes. If it doesn't match, don't install.
Web. app.nosus.foo, no install.
NO SUS Chat. Your own space for files, on your phone and every screen you sign in on, plus chats with your groups. Files open in a protected viewer with your name watermarked on them.
Send, three ways.
- Burn: the file opens once, then it's gone.
- Watermarked link: anyone can open it, no account needed, with their name on every page.
- Canary: every copy is traceable, so if it leaks you can see whose copy it was.
PDF reader. Pick NO SUS in Android's "Open with", then share it safely from there.
From 1.7.0 the app is two tabs, Chat and Send, and sign-in is Google only.
- It can't block screenshots in a browser. The Android app blocks them. A web page can't, and we won't pretend otherwise.
- The 2-digit code has a cost. While a short code is live, the key is held on our server too, until the code is used or for up to 20 minutes.
- Watermarked links aren't end-to-end encrypted. Treat them like any cloud share. Burn files are the ones encrypted on your device.
No ads. No selling your data. Delete your account from inside the app.
Privacy policy · Delete your account
Found a hole? Email the address in nosus.foo/.well-known/security.txt, currently shubhamsahu9372580326@gmail.com. Include what you found, the steps to reproduce it, the app version or URL, and what an attacker could do with it. Please don't post it publicly until it's fixed.
Source is private. This repository holds build output: the web app served at app.nosus.foo and the signed APKs on Releases. Not open source; all rights reserved.
© 2026 Shubham Sahu (NO SUS) · nosus.foo