App Lock for Android · Free
Lock your apps. Fool snoopers. See who tried.
App Lock puts a PIN, pattern, knock code or fingerprint on any app. It can also show a fake crash instead of a lock screen, photograph anyone who guesses wrong, and disguise itself as a calculator.
4.6★ on Google Play (196 ratings)Android 6.0+31 languages
Unfortunately, Gallery has stopped working.
Three ways App Lock outsmarts snoopers
A lock screen tells people there's something to hide. These make them give up, or leave evidence.
See who tried to open your apps
When someone enters the wrong PIN, pattern or knock code on a locked app, App Lock quietly takes a photo with the front camera. You find it later in Intruder Pics, with the time and the app they tried to open.
How it works →fake crash app lockThey see a crash. You get in.
With Fake Cover on, anyone who opens a locked app sees “Unfortunately, the app has stopped working” instead of a lock screen. Most people tap OK and move on. You long-press OK for about two seconds to reveal your real lock.
How it works →hide app lock iconNobody knows your apps are locked
Icon Camouflage changes App Lock's icon and name on your home screen to look like a Calculator, Compass, Music or Contacts app. Someone looking through your phone won't find an app locker to try to disable.
How it works →The everyday locking, done properly
Pick how you unlock, decide when apps lock, and keep message previews to yourself.
Notification privacy
Hide message previews from locked apps and keep a private, on-device copy of notifications you receive, even after the sender deletes the message.
Learn more →Knock code, PIN, pattern & fingerprint
Lock apps with a knock code, 4-digit PIN, pattern, fingerprint or face unlock. Add a shuffled keypad and hidden pattern so nobody can shoulder-surf.
Learn more →Schedules, groups & delay lock
Lock apps only during the hours you choose, lock a whole group of apps in one tap, and skip re-unlocking for 30 seconds when you switch apps.
Learn more →- Lock Recent AppsStop anyone opening locked apps from the recent-apps screen.
- Lock Uninstalling AppsUninstalling App Lock asks for your lock first.
- New App AlertGet asked whether to lock each new app you install.
- Full-charge alarmHear a tone when your phone reaches 80, 90 or 100% on the charger.
- ThemesChoose a lock-screen theme and app theme you like.
- 31 languagesIncluding Spanish, Portuguese, Indonesian, German, French, Hindi and Arabic.
AppLock Web
Check on your phone from any browser
Sign in with the same Google account you use in App Lock to see intruder photos and control your phone remotely.
Intruder photos
See who tried to open your locked apps or unlock your phone.
Take Picture
Take a photo with your phone's front camera from the web, then view it in Remote Captures.
Find My Device
Make your phone sound a siren, flash and vibrate so you can find it nearby.
Set up in two minutes
Install App Lock
Free from Google Play, on Android 6.0 or newer.
Choose your lock
A PIN, pattern or knock code. Add fingerprint later if you like.
Allow the permissions
App Lock explains each one. They let it spot locked apps opening.
Lock your apps
Tap the padlock next to each app, then turn on the extras you want.
Questions people ask
Is App Lock free?
Yes. Every feature works for free. An optional yearly subscription removes ads.
Which lock types can I use?
A 4-digit PIN, a pattern of at least 4 dots, or a knock code of 4 to 8 taps. On supported phones you can also unlock with your fingerprint or face.
Which phones does App Lock work on?
Android phones running Android 6.0 or newer, from any brand.
Can someone just uninstall App Lock?
Turn on Lock Uninstalling Apps in the Advance tab and Advanced Protection in Settings. Then removing App Lock asks for your lock.
Why does App Lock need accessibility and usage access?
To notice when a locked app opens and cover it with your lock screen straight away. Our safety page explains every permission and what App Lock does with it.
Does App Lock have anti-theft alarms?
App Lock can sound an alarm after repeated wrong unlocks when you're signed in, and a tone when charging reaches the level you choose. For pocket, motion and charger-removal alarms, use our free Alert24 app.
Your apps, your business
Free on Google Play. Takes two minutes to set up.
