App Lock - App Protector

An essential app for every android user. Password protect any personal data on your phone.

AppLock lets you protect any applications you want with a passcode: SMS, Email, Pictures, Calendar...any apps you choose

This is similar to apps like App Protector, App Protect, lock safe, applocker, image vault, photo lock, etc, etc. Except that it's ABSOLUTELY FREE (ad supported).

This is the top App Protection app on the android market, with millions of users. It includes advanced features such as lock delay, location exclusion, app search, better UIs and different customization options.

A pro unlock key that remove ads and unlocks more features is on the market now