AppLock is a smart security app lock, apps to lock your apps, app to hide pictures, vault gallery & safe lock app for Android. App lock android help your keep safe & full protection your android devices with password protect apps. Privacy lock by password: Contacts, Message apps, social apps, System settings. No one can access & mess up your settings system apps & use your locked apps without your permission. Private photo vault app & vault gallery: hidden photos, hidden pictures, hidden vide