Three instruments for the golf player in one application.
1) Slope-o-meter.
With this feature you can measure the angle of the green you are about to put on.
Simply put the device on the grass ( beware of the wet grass ) to read the slope angle and adjust your aim accordingly.
2) Distance to the Pin.
Activate this function to measure the distance to the flag.
Simply align the button of the flag stick to the base of the camera view and drag the bar with the green arrows to align it with the top of the flag; read the distance in meters or yards and go for it.
3) GPS
Use the GPS to measure the distance of your drive or irons. Tap the first button at the shot point, after that walk to the landing point and press the second button to read the distance travelled.
(IMPORTANT: the accuracy of the measure may vary depending on the quality of GPS signal )