Outstanding as Science Class Instrument – Pro Compass Review

In a bottle rockets class at ArizonaScienceLab.org we needed a low-cost transit to measure azimuth and elevation of students' bottle rockets at their apogee. My iPhone on a 1x3 board, clamped to a tripod, did the trick. This app is stable and easy to use. And at this price, it can't be beat. The only thing I'd add for my use is a display mode with large heading and elevation numbers to make it easy to read in the field.
Review by dleeper47 on Pro Compass.