Best features: There's a reason Spotify consistently comes out on top of its music app competitors: It makes 30 million tracks available to listen to or add to playlists for free. But where Spotify really shines is its ability to allow users to find new music. Its wildly successful Discover Weekly feature delivers users with a playlist specifically curated for them every Monday. And Spotify has a library of other pre-made playlists perfect for every life event imaginable, like a pregame, morning commute, or bad break-up.
Flaws: Some big musicians have criticized Spotify, alleging the streaming giant doesn't pay artists enough for making their work available for free. As a result, some artists have pulled some or all of their music from the service. So, if you're looking to listen to Taylor Swift's entire discography or Beyoncé's powerhouse "Lemonade" album, you're out of luck.
Available on: iOS and Android.
Price: There's a free version (with ads and a mobile app where your music is perpetually on shuffle); the premium version app costs $9.99 (or $12.99 if purchased on the App Store).
Best for: People who want to discover and access the most music without paying a penny.