Lock app with pattern. Lock app with password. Keep your privacy by locking apps like WhatsApp, Facebook, Gallery or anything you want. Lock your apps with a "secure" but "easy to unlock" pattern. Lock by pattern, password, keypad many types for lock apps. Very interesting. You have customize your lock, eg: change lock type, change background.
It's free to get the installer of AppLock, also, you can check out users' reviews on Droid Informer. The app runs on Android 4.0.3 and higher. The download of this application is 100% safe. Smart lock screen has designed AppLock that lies within the Tools category.