A Spirit Level is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). This program will help you install a refrigerator or washing machine. The built-in ruler will help you measure the distance between the holes to hang a shelf or a picture. Main advantages: accuracy of measurement, easy to use, stylish design, show incline, ruler (dimension length, zero level with audible indication, calibration, 3 different display modes, measuring angles of slope, angle measurement with hold function and the calculation of the angle.
The Electronic Level is a beautiful, functional and easy-to-use tool for any smartphone or tablet and will help you replace the following construction tools when they are not at hand: bubble level, laser level, clinometer, plumb bob, protractor
This tool will be of great help to you.

Level (waterpas), ruler. Measuring angles and slope.