App Lock - Lock Apps, Password

App Lock helps protect selected Android applications with a private pattern or PIN. Choose the apps you want to protect, and App Lock displays an authentication screen when one of those apps is opened.

CHOOSE APPS TO PROTECT

Browse launchable apps installed on your device, search by app name or package name, and select the apps that should require authentication.

PATTERN OR PIN PROTECTION

Create a pattern, 4-digit PIN, or 6-digit PIN. The master credential is required to open App Lock and to access selected protected apps.

OPTIONAL FINGERPRINT UNLOCK

Enable fingerprint unlock on supported devices with an enrolled fingerprint. Your pattern or PIN remains available as the master unlock method.

AUTOMATIC APP LOCKING

App Lock monitors when a selected protected app enters the foreground and places a native lock screen above it. Protected apps can be locked again after you leave them.

RESTART AND BACKGROUND PROTECTION

A visible foreground-service notification helps keep protection active. App Lock can restore its protection service after device restart where Android permits background startup.

CLEAR PERMISSION SETUP

App Lock guides you through the Android Usage Access and Display over other apps settings required for protection. Optional battery and auto-start guidance is available on supported devices.

PRIVATE AND LOCAL

Your credential, protected-app selections, and settings stay on your device. App-lock protection does not require an account, backend, or internet connection.

KEY FEATURES

- Protect selected Android apps
- Pattern, 4-digit PIN, and 6-digit PIN options
- Optional fingerprint unlock
- Search installed apps by name or package
- Separate unlocked and locked app lists
- Native lock screen for protected apps
- Automatic re-lock after leaving a protected app
- Foreground-service protection with an ongoing notification
- Restore protection after device restart where Android permits it
- Local credential and settings storage

Important: App Lock requires Usage Access and Display over other apps permission to detect and protect selected applications. Battery and manufacturer background restrictions may affect continuous protection on some devices.