We provide a slider to adjust the sensitivity. It will generate an "alarm" as soon as a metal is detected.
You can adjust the location of the "detector" by dragging it around the screen.
We have a state of the art stone compass as an added feature, just tap on the compass seen in the screen.
All metals that contain oxides can cause measurable variations in the readings of a magnetic compass.
We use data from the iPad's compass to estimate the magnetic field, and then detects increases in strength that occur when the iPad is placed near a ferromagnetic metal (like steel or iron).
· iOS 3.2 or later