App Lock with Intruder Selfie

Keep chats, photos, email and payment apps private. App Lock puts a fingerprint, PIN, pattern or secret knock in front of any app you choose, and quietly tells you when someone tried to get in.

LOCK ANY APP IN A TAP
• Lock messaging, gallery, email, social, banking and settings apps
• Unlock with fingerprint, a 4 or 6 digit PIN, or a pattern
• Relock the moment you leave an app, when the screen turns off, or after 1, 5 or 15 minutes
• Guard new installs: get offered a lock as soon as a new app is installed
• Lock system Settings so others can't easily switch protection off

CATCH SNOOPS RED-HANDED
• Snoop snapshot: after a wrong PIN, the front camera silently takes a photo of whoever is trying
• "While you were away" report the next time you open App Lock
• Optional siren after five wrong guesses
• Escalating lockout stops guessing games
• Turn any snoop photo into a funny WANTED poster and share it if you want to

UNIQUE PROTECTION TRICKS
• Secret Knock: unlock by tapping a rhythm only you know, with a backup PIN
• Silent alarm PIN: a second code that opens the app normally while quietly logging it and taking a photo, for moments when someone forces you to unlock
• Fake crash screen: locked apps pretend to have crashed. Long-press the app name to reveal the real lock
• Scramble keys: the keypad layout changes every time, so smudges and shoulder-surfers learn nothing
• Invisible pattern: draw your pattern with no visible trail
• Emoji keys: friendly faces on the keypad, same code underneath

HIDE IN PLAIN SIGHT
• Disguise the App Lock icon as a Calculator, Clock, Weather or Notes app
• The Calculator disguise really calculates. Type your PIN and press = to get in
• Anti-uninstall guard keeps others from removing App Lock

FOCUS LOCK
• Rest distracting apps for 15 minutes to 2 hours
• Until the timer ends they show a calm focus screen, even if someone knows your PIN
• Emergency hold-to-unlock when you really need it

LOOKS GOOD, FEELS GREAT
• Living lock scenes: Vault, Ocean, Aurora, Galaxy, Neon City, Sunset, Forest, Midnight or your own photo
• Guard level dial shows how protected your phone is and what to switch on next
• Satisfying sounds and haptic taps (both optional)
• Panic tile in Quick Settings relocks everything instantly

PRIVATE BY DESIGN
• Works completely offline. App Lock does not request internet access
• Your PIN, pattern and security answer are stored only as secure hashes
• Snoop photos stay on your phone and are excluded from backups
• No account, no sign-up

HOW IT WORKS
1. Create a PIN, pattern or secret knock
2. Pick the apps to protect
3. Allow the permissions below and you're done

PERMISSIONS, EXPLAINED
• Usage access: to see which app was just opened so the right app can be locked
• Display over other apps: to show the lock screen on top of protected apps
• Camera (optional): only for snoop snapshots after a wrong code
• Notifications (optional): to offer locks for newly installed apps
• Accessibility (optional, "instant detection"): makes locks appear with zero delay. App Lock reads only the name of the app that came to the front, never text or anything on screen
• Device admin (optional, "anti-uninstall guard"): only prevents App Lock from being removed without your code. No other admin powers are used
• Ignore battery optimization (optional): keeps protection running on phones that stop background apps

FORGOT YOUR LOCK?
Set a security question during setup and you can reset your lock any time.

Questions or ideas? Reach us through the contact details on this page.