App Name: AppLock [Android App]
Developer: DoMobile Lab
App Market: Download Page
AppLock can lock Facebook, Whatsapp, Gallery, Messenger, Snapchat, Instagram, SMS, Contacts, Gmail, Settings, incoming calls and any app you choose. Prevent unauthorized access and guard privacy. Ensure security.
AppLock can hide pictures and videos. Hidden pictures and videos are vanished from Gallery and only visible in the photo and video vault.
AppLock has random keyboard and invisible pattern lock.