Field Protractor Pro

Field Protractor Pro is an app that allows you to measure angles, lengths and areas in a photograph. Take a photo of an angle and line up the protractor arms on the screen to tell you the angle.

It also allows you to measure the length of an object in the photograph by setting the scale against another object of known length. Overlay the scale line to an object you know the length of and you can set the scale to find the length of any object at the same distance from the camera.

What can I use Field Protractor Pro for?

Measure Angles: Take a photo of an angle and line up the protractor arms on the screen to tell you the angle.

Third Arm Length: Field protractor will calculate the length of the third arm in pixels or any unit if the scale and units are set.

Measure Circumference: Use either the base or angle arm to mark the diameter of a circle and the circumference is displayed.

Measure Area: The area of the triangle created using the base and angle arms, and the area of the two circles is displayed.

Find length: Overlay the scale line to an object you know the length of and you can set the scale to find the length of any object at the same distance from the camera.