AppLock – PIN & Fingerprint
Tools
Lock any app with a PIN, pattern or fingerprint. Offline, no ads, no tracking.
- Price
- $0.99
- No in-app purchases
- Updated
- Nov 6
- 2026 · v1.1.0
Screenshots
About AppLock – PIN & Fingerprint
AppLock keeps your private apps private. Choose which apps to protect — messages, photos, banking, social media, gallery, notes — and AppLock asks for your PIN, pattern or fingerprint every time someone tries to open them.
WHY APPLOCK
• Lock any installed app with one tap
• Unlock with a 4–6 digit PIN, a pattern, or your fingerprint / face (when your phone supports it)
• Choose when apps lock again: every time you leave, when the screen turns off, or after 30 seconds, 1 minute or 5 minutes
• Protection against guessing: after 5 wrong attempts the next try has to wait 30 seconds, and the wait doubles with every further 5 failed attempts
• AppLock protects itself too — nobody can switch your locks off without your PIN
• Works completely offline: no account, no internet access, no ads, no tracking
• Clean dark lock screen that shows the icon of the app you opened
• Available in English and Turkish
HOW IT WORKS
1. Open AppLock and create your PIN or pattern.
2. Switch on the apps you want to protect.
3. Allow the Accessibility permission when asked, so AppLock can tell which app you opened.
From then on, opening a locked app shows the AppLock screen first.
ABOUT THE ACCESSIBILITY PERMISSION
AppLock uses Android's Accessibility Service for one purpose only: to detect when an app that you chose to lock comes to the foreground (it receives only the app's package name), so the lock screen can be shown. AppLock does not read what is on your screen, does not see your text, passwords or keystrokes, does not take screenshots, and does not collect, store off-device or share any personal data. Everything stays on your device. You can turn the permission off at any time in Android Settings > Accessibility, but locking will then stop working.
PRIVACY FIRST
Your PIN or pattern is never stored in plain text — only a salted hash, kept in Android's encrypted storage on your device. AppLock has no servers and does not request the internet permission.
TIPS
• On some phones (Xiaomi, Huawei, Samsung, OPPO, vivo) battery savers can stop background services. If locking stops working, exclude AppLock from battery optimization and allow auto-start.
• If you forget your PIN, the only way to reset AppLock is to uninstall and reinstall it.
Questions or ideas? Contact: [email protected]
WHY APPLOCK
• Lock any installed app with one tap
• Unlock with a 4–6 digit PIN, a pattern, or your fingerprint / face (when your phone supports it)
• Choose when apps lock again: every time you leave, when the screen turns off, or after 30 seconds, 1 minute or 5 minutes
• Protection against guessing: after 5 wrong attempts the next try has to wait 30 seconds, and the wait doubles with every further 5 failed attempts
• AppLock protects itself too — nobody can switch your locks off without your PIN
• Works completely offline: no account, no internet access, no ads, no tracking
• Clean dark lock screen that shows the icon of the app you opened
• Available in English and Turkish
HOW IT WORKS
1. Open AppLock and create your PIN or pattern.
2. Switch on the apps you want to protect.
3. Allow the Accessibility permission when asked, so AppLock can tell which app you opened.
From then on, opening a locked app shows the AppLock screen first.
ABOUT THE ACCESSIBILITY PERMISSION
AppLock uses Android's Accessibility Service for one purpose only: to detect when an app that you chose to lock comes to the foreground (it receives only the app's package name), so the lock screen can be shown. AppLock does not read what is on your screen, does not see your text, passwords or keystrokes, does not take screenshots, and does not collect, store off-device or share any personal data. Everything stays on your device. You can turn the permission off at any time in Android Settings > Accessibility, but locking will then stop working.
PRIVACY FIRST
Your PIN or pattern is never stored in plain text — only a salted hash, kept in Android's encrypted storage on your device. AppLock has no servers and does not request the internet permission.
TIPS
• On some phones (Xiaomi, Huawei, Samsung, OPPO, vivo) battery savers can stop background services. If locking stops working, exclude AppLock from battery optimization and allow auto-start.
• If you forget your PIN, the only way to reset AppLock is to uninstall and reinstall it.
Questions or ideas? Contact: [email protected]
What’s new
Version 1.1.0 · Updated November 6, 2026
New design: easier-to-read font, simpler lock screen and keypad, app search and Locked/Unlocked filters, clearer settings. Lock any app with PIN, pattern or fingerprint.