Apple is shipping IOS9 for our iPads and iPhones, and WatchOS2 for our Apple Watches, at some point today. It’s a really, REALLY good idea to follow the advice in this article:
Prepping for iOS 9: Backing Up Health, Activity, Keychain Data Requires Encrypted Backup – The Mac Observer
Because the last thing that you might want to do is to re-enter your passwords for a bunch of apps that suddenly forgot them, due to the update. Having done that myself in the past, I would hate for it to happen to you.