Turn your iPhone 3GS into a metal detector with the iMetal app for the iPhone 3GS. iMetal uses the built in magnetic detector / compass to measure the surrounding magnetic field and alerts when metal objects (or strong magnetic objects) are detected with an optional audio and vibration.
Here is a video demo of the iMetal app on the iPhone
This 3rd Party App is available at the Apple iTunes AppStore. Browse the full list of all AppStore apps filed under the AppStore category.
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