AngleMeasure is a useful tool that quickly allows you to measure an angle between two lines. This app can be used in a variety of applications, including carpentry (pitch of a roof, cutting angles) and medicine (angles on an X-ray).

AngleMeasure is easy to use. Simply place the iPhone against the surface you wish to measure, align the edge of the phone, and press the start button. As you rotate, you'll see the angle displayed on the screen in easy to read large print. Pressing Stop will save the measurement, and you can repeat the process as much as you want. Reset will clear the old measurements from the list.

AngleMeasure requires a newer iPhone/iPad that contains a gyroscope in order to function. Repeated measurements may be needed to achieve greater accuracy due to gyro drift.