As for watchOS 3? It's nothing less than a major rethink of the platform. Your favorite apps will not only load much faster (as they're stored in memory), but the side button has changed from its original focus on contacts to bringing up favorite apps. You can also hand-draw replies, quickly access common settings and share activities to get some extra motivation. A Breathe app reminds you to relax, and iOS 10's Home app gets a wrist-worn counterpart.

And Apple TV fans, you're included too... although the upgrades aren't as dramatic. The newly launched tvOS 10 update primarily introduces a dark mode for those late-night movies, a single sign-on to spare you from signing into umpteen services and Siri voice search for YouTube. You'll need a fourth-generation Apple TV to see any of these differences.