The most popular free apps for listening to music include Spotify, Pandora Radio, iHeartRadio and SoundCloud. Apps that allow users to purchase and download music files include Google Play Music and iTunes,
Pandora's ad-supported free service allows users to generate radio stations based on a single track or artist. Users can vote on tracks they hear on the station to play more or fewer songs from an artist.
Spotify users get unlimited access to the service's full library of music with a free account and can stream music, create playlists, generate radio stations based on a song or artist, and share music with others via social media and from within the app. Spotify's free service is ad-supported.