Let use your iPhone or iPod touch as a ruler. You can measure any object by placing it on the screen.

- Just put the object on the screen and measure it.

- thRuler has an easy to use built-in inches and centimeters.

Option:
Tap Screen -Show 'Guide Line'
Double Tap Screen - Hide 'Guide Line'

===More Apps===
thChess
thRuler
Slider3x3
Ching
thBoard

See More Info below for screenshots