It is a good option to hide or lock your apps to save you from a mini heart attack when someone takes your phone, or keep some applications personal to you.
- Go to Play store and search for App Lock.
- Download the application with this icon
- Download and Install it.
- Now, launch the application.
- Setup password and Recovery Questions.
- Now you can select the applications you wish to lock.
- You can also hide your pictures and video inside Vault.