So here you are! Your app works. It’s feature-complete, and you can’t wait to submit it to the App Store, show it to your friends, and get it featured on Apple blogs. Before you hit that button, however, you have to do the second 80% of development. In this chapter you’ll learn how to make your app look its best on both Apple Watch screen sizes, how to make images look good and load quickly, and how to accommodate users in various locations and who speak various languages. These steps, while they may not be the most exciting parts of your app, will go a long way toward ensuring your users have a great experience.