Descriptions : A spirit level, a spirit level or simply a spirit level is an instrument that indicates whether a surface is horizontal (horizontal) or vertical (vertical). The Bubble Level app is practical, accurate, easy to use and an incredibly useful tool for your Android device. Hold one of the four sides of the phone against an object to test it on a level or plumb, or lay it on a flat surface for a 360 ° level.
+ Calibrate each page independently
+ Calibrate relatively (another object surface) or absolutely (earth's gravity)
+ Show angles in degrees, pitch in percent, roof pitch or inches per foot (: 12)
+ Sound effects for calibration without looking at the phone
+ Install on SD
+ Orientation lock
Required Android Versions : Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]