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A bubble level, spirit level or simply a spirit is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). Bubble Level app is handy, accurate, simple to use and incredibly useful tool for your Android device. 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, inclination in percent, roof pitch or inches per foot (:12) ● Inclinometer ● Adjustable sensitivity ● Sound effects to calibrate without looking at the phone ● Install on SD ● Orientation locking Where can you use Bubble Level ? A bubble level is usually used in construction, carpentry and photography to determine if objects on which you're working on are level. Used properly, a bubble level can help you create flawlessly leveled pieces of furniture, help you when hanging paintings or other items on the wall, level billiard table, level table tennis table, set up a tripod for photographs and much more. It’s a must have device for any home or apartment. ● Alignment of the picture, board, furniture, wall and etc.! ● Calculation of different angles in various situations! ● Checking your table, shelf and surface level of every face-up objects! ● Tracking the inclination of bike, car and etc. These are the main occasions of app usage, but you’ll find much more in practice! This application can also be used as a clignometer or inclinometer to measure angle of slope using three different units of measure: degrees, percent, and topo. It is also known as a tilt meter, tilt indicator, slope alert, slope gauge, gradient meter, gradiometer, level gauge, level meter, declinometer, and pitch & roll indicator.