Features:
- Simple and clean interface.
- True North (Default) or Magnetic North.
- Update Speed.
- GPS Location (address, latitude, longitude).



Calibration:
Move away from any source of interference, or re-calibrate by Hold the phone with the display facing up and execute a figure 8 motion.


Note:
The compass application depends on the device sensors to display compass/location exactly position. If it works perfectly in your device, this means your sensors are perfect. If it's not perfect then might be because of your device sensors of because you need to calibrate.