I'm using an iPad 2, iPod touch 5 and iPhone 5 all on iOS 8.3. I'd go up to 8.4.1 (if you JB you can downgrade these devices to 8.4.1) but I hate the music app. iOS 8 runs better than 9 and 10 on these devices. IMO iOS 8 is the best version since 6. Is anyone else still running it?