ABOUT
About Protractor
Protractor is an iOS and Android app from Appcellent. It uses your phone's built-in motion sensors and camera to measure angles, slopes, inclines, and level — so you can check a mitre cut, hang art straight, or read a roof pitch without a physical protractor, level, or inclinometer. It's free to try and ad-free.
Why we built it
Hardly anyone keeps a protractor and a spirit level in their pocket — but everyone carries a phone that already has the sensors to do both. We built a simple, offline app around them so the right measuring tool is always one tap away.
4.4
920+ Reviews Measure any angle,
right from your pocket.
Protractor turns your phone into a precision angle finder, level and inclinometer. Measure anything, anywhere.
Download the App