Learn how to cancel Compass & Altimeter subscription on iPhone, Android, Paypal or directly.
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Alternative method via AppStore:
1. A simple and easy to use Compass to retrieve useful information about your current position such as true Geographic north and true altitude above sea level.
2. EGM96 (Earth Gravitational Model) is used as the geoid reference to compute true altitude above sea level from data collected by the GPS sensor.
3. Magnetic closure cell phone cases may also disrupt the accuracy of the compass.
4. Compass better works outside where magnetic perturbations are low.
5. UTM (Universal Transverse Mercator) is a system for assigning coordinates to locations on the surface of the Earth.