Cases take a little work

This app works great. Only downside is trying to dial in the adjustments if you use a case on your phone. Not a fault of the app, but one improvement I would appreciate is some kind of in-app calibration screen for that purpose. Perhaps where you could measure a known distance a few times, and the app would calculate the thickness of the case based on the variation from the known distance and use that adjustment going forward. Otherwise, its pretty amazing how accurate this thing is.

TimDroz about Flying Ruler: 3D Tape Measure