Apple iOS 8.4 Music App2) But a revamped Music app and a fix for a bug where a specific set of characters could crash the OS.1) The update isn't as wide-ranging as iOS 8.33) Available for the iPhone 4S and newer, the iPad 2 and newer, and the fifth-generation iPod Touch.1) The redesigned music app accompanies the launch of Apple Music and the 24-hour, human-curated Beats One radio station.3) Include a setting to turn off the auto-night theme, the ability to pre-order books in a series, and various bug fixes.iOS 8.4 fixesPrevent GPS accessories from providing location data.An issue where deleted Apple Watch apps could re-install.Reference:http://montreal.fortuneinnovations.com/news/apple-ios-84-exceptional-updates-music-app-launches2) "Made for iBooks" books now work on the iPhone.