Support
Who is this made for?
Magnetometer is designed with a simple user interface just for fun and experimental use. It has no scientific meaning. Please turn to other great apps on the App Store for that.
How does it work?
Every recent mobile phone is equipped with a magnetometer which is meant for use with the compass.
Metals / magnets interfere with the compass. This is why you can bring a strong magnet or an AirPods case on top of an iPhone with the Compass app opened and see -- instead of a heading. That's because the electromagnetic field (EMF) is interfering with the heading (think of it as an arrow) and it's spinning it in all directions at random.
Magnetometer uses the EMF interference data to estimate how close metal / magnets are.
What data do you collect from Magnetometer? Can you see my coordinates?
No, Magnetometer doesn't collect or access any sensitive data, including your location. I would need to ask for permission first to see your location, anyway.
Does my iPhone have the necessary hardware to run Magnetometer?
Every iPhone 6 or later has a magnetometer. However, to run Magnetometer, your device needs to run iOS 15.0 or later.
Does using Magnetometer or putting my iPhone close to strong magnets affect it in any way?
It depends, but generally no. First, you need a VERY strong magnet, not a small coin-sized magnet.
The following might be temporarily affected when put up against a magnet:
Speaker
Camera Image Stabilisation
Is my cellular or Wi-Fi coverage / signal strength affected by magnets?
Not really. Wi-Fi and Cellular run on radio spectrums. Magnets run on EMF. There technically is interference, but it's too mininal to be observed.
As an example, let's see how a magnet interferes with light. Can you tell anything's going on? Now apply that to interference with radio.