AppLock — Best Open-Source App Locker for Android (Secure, Lightweight)
A clean, modern and open-source Android App Locker with fingerprint + on-device security.
AppLock by Pranav Purwar is a lightweight, open-source app locker designed for users who want privacy without ads, tracking, or unnecessary permissions. It works completely offline and allows you to lock any app on your phone using a PIN or biometric authentication.
🔒 Why AppLock?
- Open-source (fully transparent & safe)
- No ads, no analytics, no background tracking
- PIN + biometric authentication support
- Lightweight & battery-friendly
- Clean UI with Material You theming
- No internet permission (100% offline)
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✨ Key Features
- Fingerprint unlock
- Secure on-device storage using Android Keystore
- Lock specific apps with one tap
- Disable/enable lock anytime
- Material Design 3 UI
- No Internet permission (100% offline)
📥 Download AppLock
📌 Requirements
- Android 6.0 or above
- Fingerprint sensor (optional)
- No root required
🛠 How to Use AppLock
- Install the latest APK from the download button above.
- Open AppLock and set a new PIN.
- Enable fingerprint unlock (optional).
- Select the apps you want to lock.
- Allow “Usage Access” permission when asked.
- Your apps are now protected.
📦 Install via ADB (optional)
adb install AppLock-release.apk🧑💻 Source Code
Explore or contribute through the official GitHub repository:
🔗 AppLock — GitHub Source Code
🛡️ Security Notes
- Zero data collection.
- All PIN/biometric data stays on-device.
- No Internet permission used.
AppLock is open-source, privacy-safe and ideal for everyday use.
Tags
Apps