Protractor

 

Bring a protractor with you where ever you go with this handy iPhone app.  Now you, too, can measure precisely the lean of the Tower of Pisa!

Objects of any size can be measured; match boxes, houses, pyramids... anything you can capture with your iPhone's camera.


FEATURES


  1. Photo-based virtual protractor

  2. Multi-Touch protractor control


HOW TO MEASURE


  1. 1.Start the app and take a picture of the angle you want to measure.  Be sure to to hold your iPhone parallel to it.*

  2. 2.Click “Use Photo”. (or “Retake” if you’re not happy with your first shot)

  3. 3.Center the virtual protractor on the tip of the angle you are measuring.

  4. 4.Move the yellow control points until the guidelines perfectly bracket the angle.


* To be more percise: the iPhone should be held parallel to the plane defined by the two vectors that in turn define the angle to be measured.

Protractor v1.0

Apps

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Caliper

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Keep Me Awake

Celestial Compass

Freefall

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