Spotify opened its iOS API to developers today with the launch of libspotify. Hoping that an enhanced premium experience means more paid subscriptions, Spotify is encouraging third-party developers to write apps for the iPhone, iPod Touch and iPad that utilize its paid offering.

"We hope to empower developers to build upon what we’ve started and come up with imaginative and innovative new ways of interacting with Spotify," the company said in a statement.
 
Libspotify for iOS is available to Spotify Premium users as of today.  Spotify is also hosting a tech meetup in New York on September 7th where they'll be talking about this release and the Spotify Platform and APIs.