A free program for Android, by Sword studio.
Keep your app's locked and protected from prying eyes with App Locker for Android. This mobile application allows you to set a pattern or password lock on other apps in your phone, keeping them safe from people who wants to go through your phone's content.
You can lock each application separately. That means this app only restrict access to apps that you want, while keeping others easy to access.
It's truly a helpful app for everyone, especially if you want to hide sensitive information from other people. App Locker is also a convenient tool to keep children away from possibly harmful apps.
User reviews about App locker