Ruler Level is a free Android app developed by Giuseppe Romano that provides a useful tool for measuring and leveling. This app is a combination of a ruler and spirit level that allows you to calibrate both tools for accurate measurements. It is compatible with Android 9.0 and offers a simple and accessible interface for users.

The ruler feature of the app allows you to measure objects up to 10 centimeters long with a high degree of accuracy. Meanwhile, the spirit level feature helps you to determine if a surface is level or not. The calibration feature allows you to adjust the sensitivity of the level to suit your needs. Overall, Ruler Level is a handy tool for anyone who needs to measure or level objects quickly and easily.