by Antoine Vianey
Download this app if: you need a spirit level for your Android device.
A spirit level. Hold any of the phone's four sides against an object to test it for level or plumb, or lay it down on a flat surface for a 360° level.
- Calibrate any side independently
- Calibrate relatively (another object surface) or absolutely (earth gravity)
- Show angle in degree,...
Simple and pretty accurate — I was surprised with how accurate this was! I tried it next to a regular level and it looked good. There's a calibration feature too in case your phone doesn't work as accurately, but I haven't had to try it.