This app doesn't work on my iphone 4 IOS7! Instructions are terrible. The slider doesn't work. Press "show ruler" and I get a 3 inch ruler on the screen - useless! Can't enter a measurement when trying to calibrate it. How do I get my $2 back?
App doesn't work on my iPhone 4s. . I want my Money back
The calibration doesn't work. Shame on you for charging/scamming people with this app. I want my money back.