More on iOS: I strongly recommend upgrading ASAP to iOS 9.3.5 before you’re prompted for iOS 10, AKA your device prompts you to publicly beta test iOS 10.
Especially if you have an "older" device like an iPhone 5 or iPod 5 touch, I have heard bad (slower, more battery consuming) things about iOS 10.
I just updated my iPod 5 Touch to iOS 9.3.5, seems to be ok once you dismiss all the alerts/prompts/dialogs attempting to upsell you on various iCloud options etc.