AppLocker - Privacy Master

AppLocker – Privacy Master is the best App Lock that helps you to prevent unauthorized access and stops spying eyes. Lock sensitive apps to stop privacy leakage. Hide your personal photos in private photo vault. You can hide your personal video in secure video vault. Lock your important document in private file vault. In this way you can lock your photos, videos, files, folders, audios and documents in a most secure gallery. There is a most secure security algorithm PIN/Pattern lock for your protection.
Features
Lock apps with password lock/PIN lock, pattern lock
Photo vault, hide pictures in secure gallery
Video vault, hide videos in personal video vault
Audio vault, hide Audio in private vault
File vault, hide files and personal documents 
Intruder selfie, take picture of unauthorized person who tried to access your privacy
Lock system settings to prevent a mess by kids
Lock Google Play to prevent buy games
Allow a brief exit: no need password, pattern, again within set time
Low memory usage.