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Magnetometer

ToolToolNam Tools Contains ads

Measure magnetic field with phone sensor in μT

Downloads
1.1K+
on Google Play
Price
Free
No in-app purchases
Updated
Sep 24
2026 · v1.0.8
Get it onGoogle Play See alternatives

Screenshots

  • Magnetometer screenshot 1
  • Magnetometer screenshot 2
  • Magnetometer screenshot 3

About Magnetometer

Turn your phone into a pocket magnetometer.

This magnetometer reads the built-in magnetic sensor and shows the surrounding magnetic field strength in microtesla (μT). See X, Y, Z axis values and the total field at a glance, with a live mini chart so you can spot changes the moment they happen.

★ Three modes in one app
• Measure — total field, per-axis values, live history graph
• Metal Detector — set a baseline, get a vibration alert when nearby metal shifts the field
• EMF — quick reading classified as Normal, Slightly High, or High based on the 25–65 μT Earth-field range

★ Useful for everyday checks
• Find nails, screws, rebar or hidden wires before drilling into a wall
• Test if a magnet, speaker, or motor is producing a strong field
• Compare appliances near your bed, desk, or workspace
• Verify if a "neodymium" magnet is actually strong
• Curiosity, school science, geomagnetism class

★ Designed to stay out of your way
• Clean Material 3 interface, light and dark theme
• 37 interface languages
• Measurement runs on-device
• No account required

★ Important to know before using
• Detects ferrous metals — iron, steel, nickel. Aluminum, copper, brass, gold typically do not register.
• A magnetic phone case (MagSafe, magnetic mounts, wallet rings) sits right next to the sensor and will skew readings. Remove the case for accurate measurement.
• Sensor accuracy varies by phone model.
• This app is a reference tool. It is not a replacement for professional EMF meters or stud-finders used for safety, medical, or industrial work.

If your phone does not have a magnetic sensor, the app will tell you on launch.

Try Magnetometer the next time you want to know what the magnetic field around you actually looks like.

What’s new

Version 1.0.8 · Updated September 24, 2026

• Removed the full-screen ad that appeared when reopening the app

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