More people are buying the Apple Watch than all the other watches available in the world put together, which whether you like it or not, makes the unusual oblong case a design success. “Watches are supposed to be round,” shout the purists, but Apple is rarely one to simply follow trends for the sake of it. It makes sense that the basic shape of the Apple Watch Series 4 hasn’t changed much over the previous versions, but there are a few crucial alterations that make it more wearable, and better to use than ever before.