AppLock
Privacy tool to secure your sensitive apps.
A modern, lightweight, privacy-focused application lock for Android built with Jetpack Compose and Material 3. Supports biometric and PIN authentication, anti-uninstall protection, and zero tracking. Available on F-Droid.
Key Features
- • Biometric and secure PIN authentication per app
- • Anti-uninstall and tamper protection
- • Material 3 dynamic theming
- • Zero tracking, zero ads, fully open source
- • Available on F-Droid and IzzyOnDroid
Privacy & Security Architecture
Most Android app lockers monetize user data through intrusive background ad SDKs and analytics trackers. AppLock was engineered from day one as a zero-telemetry alternative. It contains no network requests, no tracking libraries, and requires no cloud connectivity.
Core Security Pillars
Hardware-Backed Biometrics
Interfaces with Android's BiometricPrompt API, delegating key validation to the device's hardware Secure Element / StrongBox enclave.
Overlay Protection
Uses high-priority window manager overlay channels with anti-tampering guards to intercept app launch events before sensitive views render.
Modern Jetpack Compose UI
100% declarative UI built with Material 3 Expressive and dynamic color extraction, adapting seamlessly to the user's wallpaper palette.
Anti-Uninstall Measures
Prevents bad actors from bypassing the lock by requiring authentication before accessing Android's package manager or system application settings.
Auditing & Distribution
- Zero Telemetry: Tested and verified on VirusTotal with zero flags and zero outbound network permissions
- F-Droid & IzzyOnDroid: Reproducible build recipes available via open-source package repositories
- Storage: Fully encrypted local configuration stored via Jetpack Room with SQLCipher integration