Protractor is a free Android app developed by EMREO that falls under the Utilities & Tools category. It is a protractor that allows users to easily measure any angle with accuracy. The app has both upper and lower scales, making it a versatile tool for measuring angles.

To use Protractor, simply open the app and position the camera in front of the angle you want to measure. Adjust the angle with the protractor and press any place on your phone screen to stop the camera's movement. Then, draw the line of the angle on the phone screen. It's that easy!

Overall, Protractor is a great tool for anyone who needs to measure angles on the go. Its user-friendly interface and accuracy make it a must-have app for professionals and hobbyists alike.