inclinometer

With this app, you can measure the angles of slopes and surfaces.

Measure the angles of slopes and surfaces.

The app measures two angles: rotation around the length of the phone's screen, rotation along the width of the phone's screen.

The unit of measurement is degrees.

By default, when the phone is lying flat on a surface, the angles will be close to zero. This is the "Absolute" mode for measurement.

You can also use the app in Relative mode which takes the current orientation as zero (origin) and measures the difference in angles.