Can iPod 4 Get iOS 7?
The iPod Touch 4g is similar to the iPhone 4, except for some components and ram. While the iPod Touch 4g got 256MB ram, the iPhone 4 got 512MB RAM. Said that, the iPod Touch 4g uses the same A4 processor that’s found in the iPhone 4, and that’s what makes porting iOS 7 possible.
Can I update my iPod Touch 4 to iOS 8?
The iOS 8 update can be installed on the iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, iPad Air, iPad mini Retina, iPad mini, iPad 4, iPad 3, iPad 2, and iPod touch 5. Click here for a full compatibility list.