A free program for Android, by dzLab.
This magnetic sensor app for your Android phone can help you detect and measure the strength of the magnetic field and the direction of the North.
You don't need to do anything special. Just open the app and click on the given options. You will get the values of the x, y, and z components of the magnetic field.
You can use this app as an EMF Detector or an EMF Analyzer. It can be used to find the strength of the electromagnetic field for study purposes.
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