Updated Mar 18, 2026 · v2026.03.18
Measure magnetic fields with your phone. Graph, record & export sensor data.
Measure, record, and analyze magnetic fields in real time using your phone’s built-in magnetometer. Physics Toolbox Magnetometer is a precise EMF and magnetic field meter trusted by students, teachers, engineers, and researchers worldwide. Four Powerful View Modes • Chart View Live graph of magnetic field strength in microtesla (µT) over time across X, Y, Z axes and total magnitude. • Multi Graph Compare all axes simultaneously in a multi-panel display. • Digital Readout Clean numerical interface for precise real-time measurements. • 3D Compass Visualize magnetic field direction in three dimensions. Advanced Data Tools • Record and export data as CSV via email, Google Drive, or any sharing app • Three signal filters: Kalman, Low Pass, and Moving Average • Adjustable sample rate for slow or fast phenomena • Switch between elapsed time and clock time on the x-axis • Fullscreen graph view for detailed inspection • Customizable plot line thickness Classroom and Lab Ready Designed for real scientific investigation. Use it to: • Verify the inverse square law for a point source magnet • Measure solenoid field strength as a function of current or coil geometry • Detect the frequency of magnetically driven objects such as speakers or stirrers • Map Earth’s background magnetic field • Locate hidden permanent magnets or ferromagnetic materials • Demonstrate electromagnetic induction concepts Professional and Hobbyist Applications • EMF detection and field mapping • Speaker and motor diagnostics • Geomagnetic surveys and field work • Metal and magnet proximity sensing
13 years on Google Play
This app isn't currently appearing in any tracked top charts.