App Lock is small tool that lets you secure all the apps you have installed on your device so that only you can access them by drawing the unblock pattern on the touchscreen.

The app is very simple to use: you associate an unblock pattern to the most important apps on your device, or those which you don’t want anyone (including yourself) to delete, and that’s it. Once you do this, every time someone tries to erase one of the apps a block screen will stop them.

The best part of the app is that you can even change its icon so that no one will know it’s installed on your device and so only you can see it after entering a code on your phone's keypad