Smart Cover (screen on/off) using the proximity sensor. The most effective, stable and simple android smart cover app. No configuration required. The best way to keep alive the mobile's buttons. If your device has a proximity sensor... Close cover, and Device automatically goes to sleep (screen off). Open cover, and Device instantly wakes up (screen on). Smart Cover (screen on off) for Any Tablet, Any Phone and Any Cover. Feature: 1. Using the proximity sensor, the screen turns on or turns