App Lock is an application designed to prevent unauthorized access to your Android device. This application will detect if you are currently on a program and will show a lock symbol, letting you know that the user has not yet accessed their application and/or they are trying to enter their PIN. If you attempt to unlock the application, it will show a password prompt. If the user enters the incorrect password, it will display a message saying "You don't have authorization to unlock your application." This will then return to the login screen, requiring the user to again enter the correct password in order to gain access to the application.
The idea of App Lock is simple - it protects your privacy and keeps your private data safe. If you use a common smartphone or tablet computer that has Bluetooth, OMA flash, or other type of networking technology, chances are that anyone with physical access to your device can easily gain access to it. If they have physical access, they can use your personal data or corrupt the internal memory or other parts of your device. It is highly likely that they could also take out your SIM card and copy of the personal data stored on it, which could make it impossible to recognize your contacts or send you texts or emails. App Lock will prevent this. Not only does it prevent them from gaining access to your private data, but it also prevents them from modifying or wiping your device's internal memory, which could render it useless in the event of a timeout.
App Lock is easy to use. Just install it on your locked phone and follow the on-screen steps. You will be asked for your password, which you should never share (you will also be asked for a restore pin, which you should store in a place where you will recover it). That's all there is to it. Enjoy the peace of mind that comes with knowing that your smartphone is protected and doesn't need to be opened by anyone you don't know.