Metal Detector With Sound
Metal Detector allows to identify any metal object in area, because all metals generate magnetic field which strength can be measured with this tool.

Usage is simple: Open the app, and move it around. The magnetic field level will constantly fluctuate. That's it! You can find electrical wires in the walls (like a stud detector) and iron pipes in the ground.

A lot of ghost hunters had downloaded this app, and they had experimented as a ghost detector.

The accuracy depends entirely on your magnetic sensor (magnetometer). Note that it is affected by electronic equipment (TV, PC, and Microwave) due to electromagnetic waves.
The moment a metal is detected nearby the strength of the magnetic field should increase. The magnetic field values will constantly fluctuate. The moment the maximum value is reached an alarm will rind and the device will vibrate. The accuracy depends entirely on the device sensors.
Make sure you are not around your computer or TV or Other electronic devices which can interfere with the readings of the magnetic sensor making Metal detector less powerful that it can be.