So we've had a look at how we can do a lot of things with the WatchKit SDK and making our own Apple Watch Apps, however the next thing to look at is how to communicate between the iPhone and Apple Watch app. To do this we'll have to create an App Group which is essentially a space which both apps can use which was brought in with the exetension framework.
The first thing we need to do is add "App Group" capabilities to both our iPhone app and Watch Extension targets.