Question 1

Does the online compass work on a laptop or desktop?

Accepted Answer

Usually not. A compass needs a magnetometer, and almost no desktop or laptop has one. Open this page on a phone or tablet for a reading.

Question 2

Why does iPhone ask for permission before the compass works?

Accepted Answer

Since iOS 13, Safari requires explicit consent before a web page can read motion and orientation sensors. Tap Start, then Allow. If you previously denied it, re-enable it under Settings > Safari > Motion & Orientation Access.

Question 3

Is this magnetic north or true north?

Accepted Answer

On iPhone the reading is true north, corrected by the system. On Android the browser typically reports an absolute orientation close to magnetic north. The page tells you which one it is receiving, directly under the heading.

Question 4

Why is the heading jumping around?

Accepted Answer

Magnetometers are disturbed by nearby metal, speakers, magnets, wireless chargers and phone cases with magnetic clasps. Move away from those, then move the phone in a figure-eight motion to recalibrate.

Question 5

How accurate is a phone compass?

Accepted Answer

A well-calibrated phone compass is typically within a few degrees, which is fine for orientation and general navigation. It is not a substitute for a surveying instrument or a marine compass.

Online Compass

Frequently asked questions