Synchronicity is the first iOS app that makes it easy to compare Apple Music libraries with your friends, over iMessage or WiFi.
Features include but are not limited to:
• Simple, easy way to discover new music.
• Share/compare Apple Music libraries via WiFi or iMessage.
• “Synchronicity Index” tells you how much your taste in music overlaps.
• Color-coded results show Shared Artists, Albums and Songs, as well as music in individual libraries.
• Easily access links to download, purchase or play music that is not in your library.
• Build shared playlists.
• Synch with up to 6 people at once.
And it's created by two young twin entrepreneurs who've developed apps before.
Pros:Fun way to share and compare music libraries with friends
Cons:Don't know if there are competitors....