Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
22tracks - DJ curated Spotify playlists on iOS
Spotify - Map shows when two people play same song at same time
Noon Pacific - The week’s best music handpicked & delivered to your devices
Apple Music - Apple Music app combines your personal iTunes library with Apple's music subscription service. Music you have purchased from the iTunes store, or synced over from other sources, is available in the "Library" tab. Read more about Apple Music.
tradiio - Reward-based music discovery app