Spotify

Spotify streams audio from anywhere with a Wi-Fi or cellular data connection. The disk cache prevents skipping when a connection is interrupted, but not for long. In situations with spotty service or no data, music fans can actually listen to their favorite tunes offline. To save storage space, Spotify does not automatically download any songs to the iPhone, iPad, or iPod touch. But anyone interested in playing specific albums or playlists can download them for ultimate flexibility.

Playing songs offline with Spotify means no data connection, no problem. Without a connection to Spotify, streaming music just can't play. The only issue with downloading Spotify albums and playlists is that songs take up space. iPhone owners can check available storage on their devices, which also shows which apps are using the most space. Spotify used disk space can add up quickly if there's a lot of downloaded content.

Spotify continues to add features in its race to continue domination of streaming music services on the iPhone. Recent updates to Spotify have brought a Sleep timer to the iOS app. Falling asleep to your favorite tunes, ambient noise, or podcast has never been easier. Spotify will automatically stop playing audio when the Sleep timer goes off.