Add your music to Spotify on iPhone
Spotify's Android users have it easy. In the Android version of the app, Spotify can just peek at whatever music files you have loaded on your phone and allow you to play them alongside any songs from its streaming library.
But because Apple is very particular about third-party apps accessing iTunes content, the Spotify app on the iPhone has to jump through a few extra hoops to accomplish the same feat.
The payoff? Well, if you love using the Spotify app and resent having to jump out of it to hear songs from your personal collection, you can now have everything live inside Spotify.