AppLock Master - Privacy Guard is a powerful application for Android that can securely lock your apps, as well as images, to make them exclusive for you. It has an authorization feature that protects your data, so no one else can open it other than you.

You can secure social media apps such as Facebook, Twitter, Whatsapp, Instagram, Tumblr, etc. In addition, you can lock albums, SMS, contacts, etc. to prevent tampering.

This amazing app offers multiple locking options: Pin Lock, Pattern Lock, and Knock Lock, and you can also choose your own method. 

AppLock Master - Privacy Guard also comes with a simple, clean, and user-friendly interface, which makes the app easy to navigate.