IOS 9

iOS 9 is apple's upcoming OS Operating System for iPhones, iPods and iPads. It will be released in the fall of 2015 and was announced at WWDC 15 and is available for Beta at beta.apple.com. iOS 9 will only require 1.3 GB of iPhone space to download.
 * iPhone 4S, iPhone 5, iPhone 5C, iPhone 5S, iPhone 6, iPhone 6 Plus
 * iPod Touch (5th generation)
 * iPad 2, IPad_(3rd_Generation), IPad_(4th_generation), IPad Air,
 * iPad Mini, iPad Mini with Retina Display