A free program for Android, by Quick Backup Studio.

A most professional tool for measuring angles and levels. In a simple and intuitive way, you can use this tool to measure the angle of the slope, the level, the angle of the surface and much more.

This app is based on the same technology as its real-life equivalent, the spirit level. This tool will help you to determine if a surface is in a perfectly horizontal (at level) or vertical (plumb) position.

A surface level is an instrument for measuring angles of slope (or tilt), elevation or inclination of an object with respect to gravity.

You can also use it to check if the surface is flat or not.

The best part of this application is that you can see the angle of the slope in two different views: horizontal and vertical.