Wave to lock and unlock - Phone Proximity Sensor is allows you to lock and unlock your device just by waving your hand over the proximity sensor.
Toggle the above On/Off switch to Enable/Disable the Wave Unlock/Lock Service
Wave to unlock screen is an app use Proximity sensor to capture your hand waving in front of the screen.

★ ★ ★ Wave to lock and unlock - Phone Proximity Sensor Features ★ ★ ★
•  Wave to turn on screen
•  Wave to turn off screen
•  Toggle feature wave to turn off screen
•  Toggle feature wave to turn on screen
•  Light, small, smart app: Use the sensor should be consuming less RAM, battery life
•  Just Click on button Uninstall to remove app

Wave to unlock uses the proximity sensor to detect your hand and wakes up your phone without pressing on the buttons

You can use Wave to lock and unlock - Phone Proximity Sensor:

-view your phone when cooking
-if your power and lock button in broke
-instantly hide your screen without pressing the lock button all you have to do is to wave in front of your proximity sensor and It will change the stat of your phone from lock to unlock and reverse.