Free metal detection in the palm of your handnnMain Features:n Simple to usen Detect coins and other metals objectsn Adjustable sensitivity settingsn Visual level of strength indicatedn Sound can be turned onoffnnThis free metal detector has been designed for the iPhone 3GS using the built in compass magnetometer to sense changes in the electromagnet field from metallic objects in close proximity to the phonenn Please check out our other apps, Dog Whistler Dog Whistler Pro consistently ranked in top 10, Mobile Caddy previously chosen as a Staff Favorite, Thumper, Date Util, Earthquake, and Gift Tracker.