I updated to IOS 9 last night and am so so sorry I did. Can anyone please tell me how to uninstall this IOS. I absolutely hate it. I tried contacting apple support but they want $30 to fix the problem their update caused.
The software needs some time to settle in, from a few hours up to two days.
If you want to revert to iOS 8.4.1, you'll have to do this soon, though, because Apple could stop signing the software any time.
Download the right .ipsw-file to your computer, if you don't know a site where to get it, use this one:
iOS 8.4.1 Update Available to Download for iPhone, iPad, iPod touch [IPSW Links] | OSXDaily
Backup your iPad, using iTunes or iCloud, whichever you prefer. Then disable "Find my iPad" in Settings - iCloud and turn off your iPad.
Start iTunes on your computer. Connect your device to the computer and press and hold Home and Power button for 10 seconds. Release the Power button, continue pressing the Home button. When iTunes says it has detected an iPad in recovery mode, let go of that button as well.
Select your device in iTunes, you'll find the Restore button. With a Mac, option click it. With a pc, shift click it. Select the file you've downloaded earlier and let iTunes restore your iPad.
At the moment, iOS 8.4.1 is still signed, so you should be able to revert.