Add Yahoo as a preferred source to see more of our stories on Google. This article explains how to use the iPhone compass and level. Instructions apply to iPhones running iOS 12 and iOS 11 except as ...

When I say jump, your iPhone can tell you how high.

It's best to use your compass for this (especially in poor visibility), although you can set a map using obvious landforms, landmarks and linear features like walls and paths if you’re confident of ...