This is a device locker app. A Lazy proximity locker.
Forget the power button. Just put away your device, and let Lazilock turn off your screen and lock your device for you.
This app uses the proximity sensor, which is next to where the front camera usually is. It turns off the screen when the sensor is covered. So put your phone into your pocket, bag, turn it face down on the desk, or just wave your hand over the sensor, and it'll automatically lock!
Pro version include additional settings: vibration, landscape mode, delays.
+1.1.1 Keeps screen on for incoming calls
+ 1.1 slowed down the sensor reading rate.. this improves power consumption
+ 1.0.34 Fixed an ANR error, and also I think the cause of some user's getting stuck in lock state
+ 1.0.31 Fixed a bug on the greenlist
+ 1.0.2 Added exception list that users can customize, called Green List. Lazilock will not interrupt if any green-listed apps are running. You have to add your camera and favorite games yourseles =) Feel free to comment/email!