EngLearn stores all data locally on the user's device using SwiftData. The application:

• Makes zero network requests
• Collects zero telemetry or analytics
• Has zero third-party dependencies
• Stores data only in the app's sandboxed container
• Requires microphone access only for the Speaking module (user-initiated)

If you discover a security vulnerability, please report it responsibly:

1. Do not open a public issue
2. Email: aderamdani@proton.me (replace with your actual security contact)
3. Include a description of the vulnerability and steps to reproduce
4. Allow reasonable time for a fix before public disclosure

EngLearn runs in Apple's App Sandbox with the following entitlements:

• com.apple.security.app-sandbox: Enabled
• com.apple.security.files.user-selected.read-write: For export features
• com.apple.security.device.audio-input: For speech recognition
• com.apple.security.device.microphone: For pronunciation practice