This Is Perfect
When I am on the job site and forget my tape measure I know I have an accurate backup now. Off by only 1/8" when measuring a wall I was quite pleased.
What could be added? Rotating the blue card icon could use an auto lock feature that snaps to every 90 degrees so I know I am getting a perfect horizontal or vertical alignment. Once you finish zooming in and lining up with the card the image tends to drift a little if you dont raise your finger perfectly straight up but this is hardly an annoyance.
Well done.
ThulsaBoom about
RulerPhone - Photo Measuring