Ghost Detector Pro is an application that uses your mobile device sensors to detect sources of variable magnetic emissions. Which could indicate us the presence of some kind of paranormal activity.
Not be shown magnetic fields at constant frequencies such as those generated by electronics, for example: TV, routers, computers, chargers, mobile phones, etc.
The application will show a green dot on the radar in case there is nearby a source of magnetic emission.
The detection range varies between 0 and 30 feet approximately, depending on the mobile device used.