Point the compass to true north or to magnetic north

You can choose to navigate with your compass based on either true north or magnetic north. Magnetic north, which is what a standard compass points to, can be influenced by several factors and isn't constant. True north, or geographical north, is what you would see on a paper map and is constant. If you would prefer to navigate based on true north (for example, if you are using your compass to follow a map) you must turn on GPS.
In the compass app, do one of the following: