Apple Watch is wedded to your iPhone for some key functions. But Apple created new ways of physically interacting with it and redesigned the iOS UI to create an intuitive, highly customizable experience and appearance for the device, which starts at $350. It also gives users a choice of two sizes, three materials (in different finishes), and a choice of bands in different styles and materials. All of these let you create a device that is uniquely, unmistakably your own. Here’s how they did it.