Apple Music is the official music app from Apple, now also available for Android devices. With it, you can enjoy all the music from your iTunes account; that is, as long as you purchase the service, which costs 10 dollars a month. It's important to mention that, although you have three free months to enjoy, Apple charges for the next month automatically.
The interface in Apple Music is elegant and easy-to-use. You can easily access all the music of any artist, listen to customized radio stations from iTunes, and discover music that's similar to your favorite artists.
From the My Music tab, you can quickly access all the music you've purchased on iTunes. That said, you need a paid Apple Music account to access this content. In other words, if you don't pay, you can't listen to anything at all.
Apple Music is a good music app ... if you're already a frequent Apple user and have an Apple Music account. For the rest of the users, it doesn't offer anything interesting.