The app uses your device's built-in sensor magnetometer to detect the electromagnetic field generated by a magnetic metal. When you move your phone a fluctuating magnetic field will be detected by this application. Interesting finding lost Gold rings, Bangles was a concept only through mobile phones, now women can use this brand new Gold & metal detector tool to find out their precious gold and jewelleries. process of gold metal detecting will be start by pressing the find button inside the app.