More than 6.5 million people are paying for Apple Music, and another 8.5 million are still enjoying a free trial, Tim Cook has confirmed. Users “love the human curation” aspect that doesn’t come with rival music streaming services, the Apple CEO added.

Cook, speaking at the Wall Street Journal Digital Live conference on Monday — where he also confirmed a pre-order date for the new Apple TV — said he is “really happy” to see 6.5 million paying subscribers already. “The runaway here is really good.”

During its free trial, around 11 million people used Apple Music, which means around 60 percent decided to go on and pay for it. That’s only a third of the paying subscribers Spotify currently enjoys, but it’s worth remembering Spotify has been around a lot longer and supports all major platforms.

Apple Music, on the other hand, is currently only available on iOS, and OS X and Windows through iTunes. Its user base will almost certainly see a massive boost when the service finally comes to Android, then, which Apple says will happen this fall.

Apple Music is priced at $9.99 a month for individuals, and there’s also a family plan rival services do not offer that lets six people subscribe for just $14.99 a month.

Only after it has arrived on Android and been available for a while can we say whether Apple Music really is a success. Its subscriber figures may look small compared to Spotify’s now, but the service is off to a tremendous start so far, and should continue to grow as time goes on.