Shake Blocker is a lightweight and easy to use utility to lock and unlock the screen and keyboard of your mobile phone shaking it. Being very lightweight, battery consumption is minimal. It only works with the device's screen up and with it free (without anything to cover) to prevent unlock when in the pocket or bag. By default is limited the number of shares to unlock, so if you like and you work just to make a small payment to remove that limitation. Please, before scoring negative please contact me because many problems can be solved easily.