Compass Map Barometer

I’d like to be able to reduce the error in the direction to less than 3 degrees. I see no way to calibrate. I really like the idea of the simple arrow and ability to point in a specific direction, but 19 degrees of error is huge, with no way to correct it.

Excellent app to help position build of new religious building correctly. Small issue where when switching between magnetic and true north, phone must be repositioned before display updates to the correct reading. 2020SE

The only app I could find that pinpoints true south for accurate solar reads. Thank you for developing this! Very helpful :)