Magnetometer
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About this app
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
• 13 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.
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
• 13 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.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
No data collected
Learn more about how developers declare collection
Data isn’t encrypted
