hxreborn

hxreborn / biometric-app-lock

Public

An Xposed module to lock apps behind biometric authentication

github.comXposed-Modules-Repoeu.hxreborn.biometricapplock android app-lock biometric jetpack-compose kotlin
10
0
85% credibility
Found May 30, 2026 at 10 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Kotlin
AI Summary

Biometric App Lock is an open-source Android app that adds fingerprint and face unlock protection to individual apps on your phone. Instead of relying on Android's built-in security (which only protects the whole device), this app lets you choose exactly which apps need biometric authentication before they can open. When someone tries to launch a locked app, they see a fingerprint or face recognition prompt first—only after unlocking does the app actually start. The app works at the system level, so it catches app launches from anywhere: the home screen, notifications, deep links, and even the recent apps screen. Users can customize how quickly apps re-lock after unlocking, and optionally block screenshots in unlocked locked apps for extra privacy.

How It Works

1
🔒 You want to protect your private apps

You have apps on your phone with sensitive information—banking, messaging, photos—and you want to make sure only you can open them.

2
📱 You install the app lock module

You download and install the Biometric App Lock app on your Android phone, which works alongside your phone's Xposed framework.

3
🔄 You restart your phone

After enabling the module in your Xposed manager, you restart your phone so the app lock can integrate with your system.

4
👆 You choose which apps to lock

In the app's simple interface, you browse your installed apps and flip a switch next to each one you want to protect with fingerprint or face unlock.

5
🛡️ Your locked apps are now protected

Now whenever someone (including you) tries to open a locked app, your phone shows a fingerprint or face recognition prompt first.

6
You can customize how re-locking works
⚡
Lock immediately

Apps lock again as soon as you leave them

☕
Stay unlocked for a while

Apps stay unlocked for 30 seconds, 5 minutes, or 30 minutes after you unlock them

🔒
Never auto-relock

Apps stay unlocked until you manually lock them again

✅ Your private apps are safe and secure

Your banking app, messages, photos, and any other apps you chose are now protected by your fingerprint or face—only you can access them.

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AI-Generated Review

What is biometric-app-lock?

This is an Xposed module for Android 11+ that puts a biometric gate in front of any app you choose. Instead of relying on clunky third-party app lockers or OEM-specific features, it hooks directly into the system framework to intercept activity launches before they ever start. You pick which apps need protection, and the system prompts for fingerprint or face unlock before letting them open. Kotlin-based with a Material 3 interface, it also offers per-app relock timing and optional screenshot blocking for sensitive apps.

Why is it gaining traction?

Stock Android still lacks native per-app biometrics, and many OEM implementations are buried in settings or limited to certain apps. This module cuts through that by working at the framework level, meaning it can't be bypassed by simplyforce-stopping an app or using accessibility exploits. The UI is genuinely polished, with support for dynamic colors and both traditional and floating navigation bars. It handles edge cases like launching from recents and respects relock delays when you switch away.

Who should use this?

Privacy-conscious Android users on AOSP or Pixel ROMs who want consistent app locking without OEM lock-in. Particularly useful for banking apps, messaging clients, or any app holding sensitive data. Not ideal if you're on heavily modified Android flavors like HyperOS or ColorOS that already bundle their own solutions.

Verdict

A well-engineered niche tool that fills a real gap in Android's security story. The 0.8500000238418579% credibility score reflects solid code quality, but with only 10 stars and limited community testing outside AOSP/Pixel, it's not yet battle-hardened across the full Android ecosystem. Flash it on a supported ROM and use it for your most sensitive apps, but maybe wait for broader adoption before trusting it as your sole security layer.

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