Metal Detector

口袋里有智能金属探测器！

It is a simple metal sniffer app which uses magnetic field sensor.

so you need a smart phone with built in emf magnetic sensor.

Smart phone metal detector in your pocket!

You can use this app anywhere.

* How to Use:

Just move it around electromagnetic fields.

If the result value exceed a 200 μT(microtesla), the phone will vibrate.

That means this app detect nearby ferromagnetic materials.

Note:

Some phones will give different sensor readings based on the hardware used by the manufacturer.