Cider

There is no dedicated desktop app for Apple Music currently: if you wish to stream songs on your computer with your subscription, you have to resort to using iTunes or running the web app in your browser to access and play your music.

In the absence of a dedicated solution, Cider is a third-party, open-source client that grants users the ability to stream Apple Music songs from their machine, all through an intuitive, modern interface.

The program is fully open-source, fast and efficient, offering users the entire functionality provided by Apple Music in the web app and then some. While iTunes and the web app do not offer the lyrics function, Cider fully supports time-synced lyrics.

It should be noted that an Apple Music subscription is required to make use of this program: Apple's service does not offer a free tier. Cider is not a streaming service: it is simply a client of sorts you use to access that particular service, hence users are required to log in with their Apple credentials when first booting it up.

Aside from that, the interface was designed to appear smooth to navigate through, whilst also providing the Apple Music feel to its users: it's certainly rather reminiscent of the web app design.