EMFMeter: Magnetometer Reader

TipTinker

Contains adsIn-app purchases

About this app

EMF Meter shows the magnetic field measured by your phone's built-in magnetometer as a clear, live number in microtesla (µT).

• Live field strength in µT, with the X, Y, and Z axis values
• A label shows whether the reading is below, within, or above Earth's typical range
• Session peak with one-tap reset
• A rolling 30-second chart, so a magnet or speaker brought close shows up as a spike
• A hint to recalibrate when the sensor reports low accuracy
• Share the current reading and peak as text

Handy near speakers and magnets, for physics classroom demos, or to spot a magnetic phone mount or case. This is a phone sensor readout, not a calibrated instrument; Earth's field and nearby metal affect it.

What’s new

Performance improvements and bug fixes