App Lock: Fingerprint & PIN

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Everyone
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Content rating
Everyone
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About this app

Lending your phone shouldn't mean showing everything on it.

App Lock puts the apps you choose behind your fingerprint or a PIN. Your kid can play a game, a friend can look at a photo, a coworker can make a call, and your chats, gallery and messages stay closed. Anyone who opens a locked app meets your lock screen first.

Fingerprint and PIN locking is free.

LOCK ANY APP
• Chats, photos and gallery, messages, email, social apps, banking, the Play Store, even Settings
• Suggested apps first, so the ones that matter are a tap away
• Search every app on your phone

ONE TOUCH TO OPEN
• Your fingerprint opens a locked app in about a second
• Everyone else needs your 4- or 6-digit PIN
• Five wrong PINs in a row pause the lock screen for 30 seconds

APP LOCK LOCKS ITSELF
• Nobody can open App Lock to switch protection off without your PIN or fingerprint

ALWAYS ON
• Protection comes back by itself after a restart or an update
• Checks run only while the screen is on, and stop when it turns off, to spare your battery

PRIVATE BY DESIGN
• No account, no sign-up, no server
• Your PIN is stored only as a salted hash on your phone
• Your fingerprint never leaves Android's secure hardware; App Lock only learns whether it matched
• Which apps you lock and which apps you open never leave the phone

WHY IT ASKS FOR TWO PERMISSIONS
• Usage access: Android's way of telling App Lock which app you just opened. Read on the phone, never uploaded.
• Display over other apps: lets the lock screen appear on top of the app you opened.

FREE AND PRO
Free: fingerprint and PIN locking for up to three apps.

App Lock Pro adds:
• Lock as many apps as you like
• Choose when apps lock again: as soon as you leave, after 1 or 5 minutes, or when the screen turns off
• No ads

Pro is a subscription billed through Google Play. You can cancel any time in your Play account settings.
Lock chats, photos, messages or any app with your fingerprint or a PIN.
Updated on
Nov 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Financial info, App activity and 2 others
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

Lock any app with your fingerprint or a PIN.