Ghost Detector

Ghost detector pro is a free app that uses android phone sensors to detect Changing magnetic emissions sources Which can indicate the presence of us something supernatural Activity.
This application of magnetic fields does not appear fixed frequencies like of those generated by electronics:
example
routers
chargers
mobile
phones
TV
computers
etc..
you will see a green dot If there are sources near you indicate magnetic emission.
The range of detection varies between approximately 0 and 30 depending on the mobile device used.