A full version app for iPhone, by Jose Martin.

Emf Detector is a handy, simple, and effective tool to detect and measure magnetic fields in nature. It supports a wide range of measurements and units.

The app provides an intuitive interface, a visual display, and a graphical analysis.

It is a simple, effective, and free tool for measuring magnetic fields in nature.

The app is designed for users who are not experts in physics. It is a useful tool for measuring the magnetic field at home, at school, or at work.

Note: This tool does not work on iPod Touch devices, since they do not have a built-in compass.