Question: Compass not working properly on iOS 11.2.
The native iOS compass is not working as expected on iPhone 7 Plus. I've adjusted Compass to show the true north and its calibration is active on location services. Besides that, I removed it from iPhone memory and called it again, away from metallic objects. I also used a common (analogic) compass to verify everething.
Unfortunately, it points the magnetic north instead the true one. I thought compass was not considering magnetic declination and, therefore, it is not working with true north. So I turned off "Use True North" on settings and this has worsen compass orientation. It doubled the compass orientation error! It seems the magnetic declination data is reversed, i.e. mag. declination West is East and vice-versa. Sometimes, compass points the East direction towards Earth's true north - a 90 degrees of error.
I would like to use Sun Seeker app back and fine again, but it depends on iOS Compass working well. Would you have an idea to sort this out?
iPhone 7 Plus, iOS 11.2.1