Use this smart metal detecting app to detect metallic things. You can use it as a gold master metal detector.The new Metal detector app is free with all its features and Makes cool graphical charts of magnetic field intensity. l. The gold detector has a user-friendly interface that is very easy for us.New metal detectors use the built-in magnetic field sensor of Mobile. When any metal object is near the metal detector, its reading will be up to or above 59μT then there are more chances of metal.