A free app for Android, by Spain Paranormal.

Radio Hack Ghost Box is an fm radio scanner that emulates the scanning of a real radio by helping the user communicate with ghosts. It allows the user to choose the frequency. It is a very useful app for paranormal research or for those that want to have fun. It can be used as a haunted ghost box or a toy. It is an ideal tool for those that want to communicate with the dead or with other spirits.

The user can adjust the speed of the scanning and can even use the echo button to get a better reception.