iLevel is a simple spirit level as the iPhone program. It is doubtful if anyone uses this program to the building trades. The App works fairly easy. iLevel uses the iPhone’s integrated accelerometers and then functions as a digital level for picture-aligning, table-building, driveway-levelling needs.
The spirit is named after a tap on the screen is active. We see a spirit-centered in the middle, which is a white oval object shows that depending on the angle. For this program there is not much to report, except that the iPhone's internal accelerometer is used to determine the angle.