iOS8 Devices

iOS 8 supports not all the apple products but some of them.
Below is given the list of iPhone,iPad and iPod list which are supportive to iOS 8 .so install and enjoy

iPhone4S
iPhone 5
iPhone 5S
iPhone 5C
iPhone 6
iPhone 6 Plus
iPad 2
iPad 3
iPad 4
iPad Air

iPad Mini
iPad Mini 2

iPod Touch 5G