Explore the magnetic and electromagnetic fields all around you with EMF Detector. Your new iPhone 3GS can detect how strong the magnetic fields are with respect to the x, y, and z axes. Now you have access to this information in a interesting and responsive way. Run the EMF Detector around your walls to discover any leaking electromagnetic fields (EMF) coming from faulty wiring (or paranormal activity.). Use it as a metal detector. you'll notice that the needle will rise a bit when you place the device near ferromagnetic metals (such as steel and iron). Or, simply show off how cool your new iPhone 3GS is by watching the sin wave of EMF activity generated by a nearby motor is plotted before your eyes. Simply load the EMF Detector on your 3GS iPhone, and you will immediately see the magnetic forces detected by the phone plot in real time, allowing you to easily identify fluctuations in magnetic (MF) and electromagnetic (EMF) fields. The computed magnitude of the detected field is also indicated by the needle display to aid you in hunting out those magnetic hot zones. Have fun.