Cost: Free | Developer: Spotify | Tested on: iOS | Version 0.5.4 | 16.9MB
The mobile version of Spotify gives you access to the service’s library of music on the go.
After logging in with either your Facebook or Spotify account, the app offers a free 48-hour trial of its free service for users that have not tried it previously.
Once the Premium trial is over, users can continue to listen to their own music, or subscribe to the premium service. Premium allows users to sync favourite playlists to their mobile device and listen offline, or use the online service with full access.
Other features of the Premium account include wireless sync, playlist creation and sync, starring favourite tracks, and the ability to send music direct to Last.fm and Facebook.
Get it here: Apple App Store