With EMF Detector for iPhone explore the magnetic and electromagnetic fields all around you. It 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 an interesting and responsive way. Run the EMF Detector for iPhone around your walls to discover any leaking electromagnetic fields (EMF) coming from faulty wiring or paranormal activity. Use it as a metal detector you will notice that the needle will raise 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.