Spoty is a very simple remote for Spotify. If you are playing through a computer during parties etc, Spoty will make you able to change song easily. The Spotify-machine and iPhone have to be on the same network for Spoty to work. Just tap the settings-icon in Spoty, and enter the hostname or IP-address of the Spotify-machine. The default port and password setting doesn't need to be changed, but that's up to you. Just make sure the tray-application uses the same port and password.