Pandora iMessage App - Say it with Pandora — Send and receive songs in iMessage
Heartbeat - Listen to music with your friends together, on Spotify
YouTube Music - YouTube Music is a streaming app primarily designed for Android and iOS mobile devices. The app lets individuals search for music from their favorite artists, enjoy playlists, and access 30 million musical tracks.
Liyo - Stream your favorite music live with friends 🎶
Spotify - Map shows when two people play same song at same time
Parallel - Listen to music with friends over Spotify at the same time