App Shopper reports that the app is now available in the US and requires a $10 (?6.37) a month Napster plus Mobile Access subscription. Over 10m tracks are available and the app integrates Billboard charts dating back to 1955.

The app also features a new releases tab, recommendations and playlists based on popularity.

As with the existing Spotify, we7, MOG All Access and Rhapsody apps, users can store tracks locally on their handsets for playback when they do not have ...