Shouldn't this be in the advertising thread? Or did you forget to read the rules?
Shouldn't avid hikers have a real compass that works even with flat batteries? One that can easily be calibrated and isn't affected by temperature as much.
Sure, for shopping centers a compass app may be useful.
How do you avoid device to device variability and how often do you force re-calibration?
Men wanted for hazardous journey. Low wages, bitter cold, long hours of complete darkness. Safe return doubtful.