This Wednesday iOS 9 will be released - that's the newest version of the software operating system for your Apple mobile device. This software is made for your iPad, your iPhone, and your iPod Touch. If your device can run iOS 8 naturally, it'll be able to run iOS 9. This goes back to the iPod Touch 5th generation, iPad Air (1), iPad 2, and iPad mini. The oldest iPhone that can run iOS 9 will be the iPhone 4s.