Metal Detector is an app which detects the presence of metal nearby. Metal detectors are useful for finding metal inclusions hidden within objects, or metal objects buried underground. This app measures magnetic field using a magnetic sensor that is built into your device. The magnetic field level (EMF) in nature is about 30 to 60 µT(micro tesla).
Get the free installer of Metal Detector 1.3 and have a look at users' reviews on Droid Informer. The app runs on Android devices 3.2 and above. It's secure to download this application. My Mobile Tools Dev is the developer of Metal Detector which can be found in the Tools category.