iHandy Carpenter!

The lightest, prettiest and most handy carpenter tool kit in the world, right on your iPhone Get 5 professional tools in ONE app at only half the price of buying each You can hear from app reviewers and happy users:Not only are these tools functional, theyre also gorgeous, with woodgrain and lighting effects that makes them seem straight out of Leonardo da Vincis workshop. - OReilly Media, Best iPhone AppsFathers Day App for Your #1 Dad - CNNReally handy and I like the style of the user experience a lot. If the surface is almost vertical to the ground, we suggest that you use the plumb bob tool to measure the surface instead.-CALIBRATION INSTRUCTIONSPlease refer to Help & Instructions in iHandy Carpenter settings page