The answers to this question imply that the reminders do not recur… but that's for versions prior to iOS 9.
Much like with newer versions of OSX, iOS 9 will remind you every other day or so to update giving only the options to "update now", "remind me later", "view details". The third option is the only way to avoid "scheduling" a reminder later and it's my go-to option in OSX to shut the reminders off for a bit… but I don't want to stop in the middle of what I'm doing to switch over to the Settings app and then go right back to the app I was actually using.
This is very annoying to me, particularly as I intentionally skip updates. Is there a way to turn this "feature" off?
Best Answer
This is kind of a yes/no question. No, most people can't or won't be bothered to turn them off. Yes - you can turn off all network access or block the update servers.
The iOS 9 itself does not have a toggle you can flip and the software is designed to let you know the update is available. I'll leave my opinion aside whether Apple designed this correctly, but from a security standpoint. If you are on iOS 9 - upgrading to patch levels doesn't break existing apps and solves known security, performance, energy efficiency and bug issues, so declining a 9.0.x or 9.x update is far harder to justify than just not upgrading to 9.0 in the first place.
The best technical way to block iOS 9 updates is hosted on JAMF Nation discussions:
This involves blocking two URLs on your firewall (could be useful if you're using a Wi-Fi only iPad at home):
You'll want to have control over your network, have an MDM and the energy to configure your devices to avoid updates. Basically, preventing this is a short term battle and I know it makes sense to try it from time to time or if your organization needs to buy time - but it's a pain since the design is to push updates on each device that connects to the internet.