Bubble Level is a useful app for Android devices that helps determine whether a surface is horizontal or vertical. It is a simple and accurate tool that can be used in construction, carpentry, photography, and other situations where leveling is important. The app can be calibrated independently for each side of the phone and can show the angle in degrees, inclination in percent, roof pitch, or inches per foot. It also has sound effects to calibrate without looking at the phone and can be installed on an SD card.

The app can be used to align pictures, boards, furniture, walls, and other objects. It can also be used to calculate different angles in various situations, check the level of tables, shelves, and other objects, and track the inclination of bikes, cars, and other vehicles. The app can be used as a clignometer or inclinometer to measure the 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.

Bubble Level is a must-have device for any home or apartment. It can help create flawlessly leveled pieces of furniture, hang paintings or other items on the wall, level billiard tables, level table tennis tables, set up a tripod for photographs, and much more. The app is easy to use and can be used to test 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.

In conclusion, Bubble Level is a handy and useful app for Android devices that can be used in various situations where leveling is important. It is a simple and accurate tool that can be calibrated independently for each side of the phone and can show the angle in degrees, inclination in percent, roof pitch, or inches per foot. The app can be used to align pictures, boards, furniture, walls, and other objects, calculate different angles, check the level of tables and shelves, and track the inclination of bikes and cars. It is a must-have device for any home or apartment.