Above all the engineering mistakes made in this list, I think the most egregious developer issue is a sense of urgency. I understand that there are companies and developers who feel pressured to be on Apple’s latest platform on launch day, but it’s a brand new platform, and most developers probably have no idea how they or their users will be using the Watch. Take your time and slow down. Conceptualize reasons why a Watch owner may want your app on their wrist for five seconds at a time. But don’t make the mistake of thinking you need to be there on the very first day. It’s just getting started.