A Smart 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.

This app measures the angle or slope of an object simply and accurately.
Put the back of your device against a desk, or put its short/long side on a frame.

* Main features:
- Surface level (bubble level)
- Spirit level (clinometer)
- Zero calibration
- Tilt units (degree, percent, radian, roof pitch)
- Lock screen
- Material design