Your iPhone's compass is a feature you may not know about, but it can save your life. However, you'll need to calibrate it ...

Turn your body (not just the compass) so the magnetic needle is contained within the orienting arrow. Voilá! You're now facing north. If you want to face east instead, turn the housing so the E ...

The needle will turn and then come to a complete stop. It will be facing magnetic north. You can check this by placing the compass next to the bowl. The needle is being affected by the Earth’s ...