A free program for Android, by MRE Programming.
This app uses the magnetic sensor of your phone and displays the reading with a line of LEDs and a classic needle meter.
You can easily use this as a detector not only for EMF but also for magnets, metals, devices, and even (as some people believe) paranormal entities.
EMF stands for the electromagnetic field. It is a combination of electric and magnetic fields.
In addition to the magnetic and electric forces, the world is also filled with other forces, such as gravity, pressure, and warmth. These forces are all part of the electromagnetic field.
When an object is near a source of electromagnetic energy, the energy can change the state of the object. This is called a magnetic effect.
