iLEVELi

iLEVELi is an iPhone application that uses gravity and the iPhone's accelerometer to measure angles. Use iLEVELi to level pictures, bookcases, and appliances at home. Use it to level posters and displays for your work on the road. Use it to level a pool table after work. Carpenters and contractors may find iLEVELi to be a handy aid. Optional slope indicator shows 1:x or x:12, suitable for work subject to the Americans with Disabilities Act.

With calibration, iLEVELi can correct the accelerometer's gain and offset errors in three dimensions for better accuracy.

iLEVELi will surprise and delight its users—and their friends—with the kind of user experience iPhone users have come to expect.