Guides, tips, and science behind metal detection and magnetometers.
Forget expensive stud finders — your iPhone has a built-in magnetometer that can locate wall studs by detecting the nails and screws holding them in place. Here's exactly how it works.
Drilling into a live wire can cause electrical shock, fire, or expensive damage. Learn how to use magnetic field detection to trace wires behind walls and drill safely every time.
Your iPhone contains a magnetometer — a sensor that measures magnetic fields. Learn the science behind how it works, what it can detect, and practical uses beyond the compass app.