Good App, works as advertised

I tested it on a few items and when I was careful with the set up and calibration I could get accuracy within about a quarter inch on the 7 or 8 objects I measured.
It is hampered by the iphone cameras inherent limitations and I did find that the measuring stick was a little dificult to position once the picture was taken. Still needs a few tweaks and a tad pricy for version 1. Its easier to grab a measuring tape but this works if you happen to be without one.

ThrillSeek about RulerPhone - Photo Measuring