App Lock Pro description

100% lock, unlock any application on the phone, a key lock, simple and fast! Protect personal privacy.
AppLock can protect your privacy and private apps.
can lock your private apps (like SMS, Contacts, Gmail, Facebook, Twitter etc.)
and system apps (Like Settings, Calls etc.) and protecting your privacy.

Features:

* Support pattern unlock and password unlock.
* Lock 3rd party apps and system apps.
* Clean interface and easy to use.
* you can add any background from your gallery .
* Free.