Bubble Level is a free Android app developed by BRL technologies. This app allows you to measure the tilt of your mobile phone on one edge or flat. No more sloping tables or wrong frames, now you can line everything up! The app features calibration, display of the angle values, hold function, sound notification at equilibrium, and no ads.

The calibration feature allows you to adjust the app according to the surface you are measuring. The angle values are displayed clearly, making it easy to read. The hold function helps you to freeze the angle value, so you can take a closer look at it. The sound notification at equilibrium alerts you when the surface is level. There are no ads in the app, making the user experience more enjoyable.

Overall, Bubble Level is a useful app for anyone who needs to measure the tilt of a surface. It is easy to use and has all the necessary features for a bubble level app. If you enjoy using the app, you can consider donating by purchasing the paid version.