The Paranormal State iPhone application turns your device into a simulated EMF meter. Paranormal investigators use EMF meters to check for electromagnetic fields, which are emitted by nearly everything in nature, and could be a sign from the beyond. Delve deep into the strange and the mysterious with your Paranormal State EMF meter. Scan your surroundings for suspicious activity. Got a reading? Move slowly back and forth to hone in on the exact location. Or switch to manual mode and fool your friends by sliding your finger along the green line to control the action of the needle.