Apple's entry into the music streaming fray has arrived. Apple Music is now available for download via the iOS 8.4 update for mobile devices, and you'll be able use it on the desktop on both Mac and Windows machines, too. In addition to iTunes' library of over 30 million tracks, you'll also be able to stream Beats 1: Apple's 24-hour internet radio station that'll be manned by Zane Lowe, Drake and others.