As rumored, Apple introduces its long-awaited streaming service.

At today’s developers conference, Apple unveiled iTunes Radio, a streaming service that will launch this fall with iOS 7. The product will be available for free (with ad support) on iPhone, iPad, iPod touch, Mac, PC, or Apple TV, with an ad-free version for iTunes Match users.

Like Pandora, iTunes Radio will build stations around selected songs and artists. It features more than 200 genre-focused stations that “evolve” based on user interactions, and will include full-integration with iTunes and Siri. Apple also promises that iTunes Radio will play exclusive tracks and pre-releases before they are available elsewhere.

For now, iTunes Radio will only be available on US devices, possibly due to the licensing issues that delayed the project for so long.