The launching of iOS 8 marks a new update, storage and support for iPhone, iPad or iPod Touch users. If all your devices are Apple manufactured, you got to update all of them simultaneously. However, old Apple devices might not be supported by their new iOS8. Among the devices it support are iPad Mini, iPhone 5, iPhone 5C, iPhone 4S, and iPhone 5S. For iPod, only the 5th gen is supported, as well as the iPad 2, iPad Mini with Retina Display iPad 3, iPad 4 and iPad Air. The iOS 8 provides more updated apps and extra storage for backup. You can review the list of iOS8 supported devices on Apple’s official website.
Source: Expert Reviews