The free Metal Detector application for Android devices works well to find hidden treasures or to just test to see if something is made of metal. The program works by activating the on board digital compass hardware. Metallic objects change the fluctuation of magnetic energy and cause the meter to spike. Ferrous metal of course work better because this metal detector relies more on magnetic changes than professional detectors which use much more precise technology. So the next time you want to hunt for buried treasure on the beach download this free application from the Android Market and start hunting.
To download directly to your Android device. Search for Google Goggles in the Android Market, download and install. Then use Goggles to find the QR Code below. Some newer Androids already have Goggles installed.