It's kinscreen, an app for turning the screen on by showing ur hand at proximity sensor(no need to press the power button every time) and even makes the screen stay on as one holds the phone in a certain angle.It doesn't work in pie,but works well in nougat.


Similar apps i tested are -- waveup,gravity screen on/off,smart screen on off,wave unlock,proximity sensor screen on off.

https://play.google.com/store/apps/d...qtic.kinscreen