Spirit Box Ghost EVP Pro is a free lifestyle app available on Android that can instantly transmit unexplained voices known as EVPs (Electronic Voice Phenomena). The app is designed to scan the FM band with high-frequency synthetic noises such as white and pink noise, where spirit voices are believed to form words.

The EVPs that are transmitted through the app typically express intelligence and can identify people present at the investigation or provide information related to the investigation. The communications coming across are known to co-relate with the known facts about the haunted site, including specifics about the spirits present there.

Overall, Spirit Box Ghost EVP Pro is an interesting app for those interested in paranormal investigations. With its ability to transmit unexplained voices, it can add a unique element to any investigation and help paranormal enthusiasts gather more evidence.