This app was removed from the App Store.
iOS iPhone Utilities
This very simple application displays a tape measure across your screen. You can switch between inches and centimeters by shaking your device. There are no frills here, just a simple way to use your device to measure things. The inches scale displays up to 3 1/4" and the centimeters displays up to 8cm.
Tape Measure by Acceleroto.
Lead developer: Bryan Duke
Tape Measure version 1.0.2 adds 1/32" marks on the diagonal inches scale. It also further optimizes shake detection for switching units.