Uses the Magnetic Field Sensor to convert your device into a Compass. Does not need to be level. Magnetic North and True North Needles. Location is required to determine the magnetic declination - the difference between magnetic north and true north (Hence the ACCESS_FINE_LOCATION Permission). If GPS/Network location is not available or turned off, then the location can still be entered manually. Normally a compass needs to be level to get the correct reading, but this app uses the acceler