App Vault description

Lock WhatsApp, Line, Twitter, Facebook, and all apps you want, Never worry again about someone seeing your private data!
Completely free
Features:
- Small screen support
- The fastest locker on the market
- Also lock system apps
- Support android 4.x
- Support android 5.x
- Support android 6.x
- Four type locker, password, go home, fake error dialog and hide from home launcher(need root)
- Hide app from notification and recently running app screen
- Uninstall protection