It is application for measuring angle with various method. Main Function 1. Various measuring method : Gravity Sensor, Camera, Touch, Magnetic Sensor etc. 2. Calibration : Calibration function makes easy and accurate measure when measuring angle with sensor. Instruction 1. Plumb Mode 1) Set device in parallel to the baseline of the measuring object. 2) If you need, turn on the Camera by touching Camera button on the upper-right corner of the screen. 3) Read tilted Angle on the upper-l