EVP = Electronic Voice Phenomenon This app is based on the EVP theory that suggests that spirits manipulate sound on to a recording device in order to create speech. By supplying sound to spirit they will be able to leave messages at a higher frequency than without supplied sound. Unlike ITC (Ghost Box) apps this does not use any Phonetic or "Speech" sounds, this means you can rule out false positives that may occur for that reason. This is a simple app that you can bring with you on your phone or tablet and conduct EVP sessions wherever you may be.