Metal detector is a free app which detect the presence of metal by measuring electromagnetic field value. This work with device built-in magnetic sensor or magnetometer. The sensor allow you to detect objects generating magnetic fields, the greater the value of magnetic fields the stronger will be the metal. When any metal object like steel or iron is near, EMF reading will increase with a beef sound and vibration. Magnetic fields are generate by electronic devices such as phones, wiretaps, wires, sharp objects, metal screws, coins etc.
EMF meter or metal detector app will allow you to detect metal objects with your phone, it is fun and super easy to use. Feel yourself detective and surprise your friends.
Metal detector app allow you to detect metal because all metals generate magnetic field which strength can be measured by using EMF Meter or EMF Detector. The magnetic field level (EMF) value in nature is 49 microteslas (μT) or 490 milli-gauss (mg) and 1 μT = 10 mg.