If you decide to update iPad or iPhone to 9.1 be sure you backup first. I lost all my notes and iBooks where I saved my patterns. I only updated because the message kept popping up. My advice is simply to ignore it. Updates are trivial at best and not worth it at all. I hate apple!
We put the updates on two iPhones and an iPad with absolutely no difficulties. I LOVE Apple! I have an iMac and everything is so seamless. check your cloud settings. Call Apple - they will help you. 1-800-MY-APPLE. You can google and usually there are solutions on some board/forum or another. Some updates are not trivial and help your device run smoother.
