June 15, 2013, 5:13 PM — Here's how you can download the App Lock app free for Android devices.
1. Go to the Google Play page for the free app App Lock.
2. Tap the Install button.
App Lock protects your installed applications by restricting access to them. You can use a password (words or PIN), gesture, or pattern. It can lock incoming and outgoing calls, as well as screen brightness and screen rotation.