a Tesla Meter uses the manetic detector/compass in iPhone 3GS to measure the surrounding magnetic field.
Amaze all your friends by converting your iPhone 3GS. iPhone 3GS can detect metal, tesla.
When a electronic or metal object si near, the gauge is increase. Impress your friends with your iPhone's incredible hardware capability.
How to use
1st. when you open the a Tesla Meter App, a Tesla Meter is on.
2nd. Place iPhone 3GS over electronic or metal object.
contain History Graph.