[Oldeconomybuyer]

iOS 8 is horrible on older iPads and iPhones.

[RayChuang88]

I'm using iOS 8.1.2 on my iPad Air with no problems. I think it's primarily a memory issue--the iPad Air and the Retina Display iPad minis use the A7 and A8 system on a chip (SoC), which have 1 GB of system RAM and that's why they work well with iOS 8.1.2.

[Bubba Ho-Tep]

I succumbed to upgrading to iOS 8 on my IPhone 4s and my battery life immediately went into the toilet. I turned off every open app, every notification, everything, but couldn’t get more than a couple hours of life. And making a call would immediately kill it. So I bought a new 6, which was probably their plan all along.

[HamiltonJay]

Any updated iOS is horrible on previous devices, that’s always been the truth, apple has never concerned itself on the mobile device front anyway, ensuring that OS upgrades run reliably on anything less than 1-2 generations prior. If you are more than 2 generations out of date, they expect you to upgrade, period.

The only exception might be the iPad2 which they still sell, but that’s mainly due to its footprint in certain verticals, and frankly I really wouldn’t want to think how IOS 8 runs on that old hardware, sure its a dog.