Posted image — open original Last.fm is the ultimate tool to track your ever-changing music tastes and introduce you to the next artist you love. All you need to do is create an account, connect it to your streaming service (or download their desktop app if you listen to music via iTunes), and start listening. Your profile will keep record of everything you spin. After listening for a decent period, Last.fm will have enough data to whip up some personal recommendations. The app also recommends new artists, reintroduces songs you’ve previously heard, and posts upcoming concerts of artists found in your library.