Find the Metal objects around you with this handy tool!
This app measures magnetic field values using the magnetic sensor that is built into the phone. The magnetic field level(EMF) in nature is about 49μT(microtesla) or 490mG(milligauss). 1μT = 10mG.
If there is any metal in the area, the strength of the magnetic field should increase. Among other uses, it can be helpful in finding electrical wires in walls and metal in the ground.
Usage is simple: Open this app on your device, and move it around. The magnetic field values will constantly fluctuate.
The accuracy depends entirely on the sensors in your device. Note that the magnetic sensor is affected by electronic equipment (TVs, PCs, etc.) due to electromagnetic waves. This is not a bug in the app.
If this app does not work properly, it may mean that your phone's sensors are damaged, broken or non-existent. To initialize the sensors, point your phone up towards the sky and move it in a figure 8 pattern.
Sometimes a leather case with a magnetic "snap" can cause unwanted results. Remove the case to increase accuracy.