This is quite an big achievement for Apple Music and the service is still continues to add subscribers as its rival Spotify took six years to surpass the 10-million subscribers mark. Spotify announced back in June, 2015 that it had 75-million subscribers out of 20 million users pay for the service and others listen to Spotify for free.
Unlike Spotify, Apple Music does not offer free service as it offers three months free trial and after 90 days users can either pay $9.99/month or stop using the service. Apple announced that it had signed up 11 million users for the free trial, with 6.5 million paying for Apple Music. The Apple Music was built after Apple's acquisition of Beats Music that was acquired by Apple in 2014 for $3 billion.