the watch
- iphone + iwatch talk over wifi or bluetooth, prefers wifi
- once the phone + iwatch is linked, they're linked
- the watchkit app is packaged as part of your app
- install watchkitapp (goes to your watch) + watchkitextension (goes to your phone)
- if communication is severed then your app is frozen
- watchkitext - .swift / watchkitext - .storyboard
- watchapp sends @IBAction, labelSoftText(...)
- exension does not have access to your main app
three main things on the app
- interface (main)
- glance
- push notifications (static and dynamic)