Just FYI. This is the official WatchKit documentation regarding notifications.
https://developer.apple.com/library...al/WatchKitProgrammingGuide/BasicSupport.html
Short Look Notifications use the App Icon, the App Name and the Notification Text. This works for all Apps.
Long Look interfaces have to be implemented in the iOS iPhone App and the resulting representation is sent to the Watch.
Notifications are always received by the iPhone and passed on to the Watch, meaning that if your phone is switched off, the Watch will not receive notifications. (obviously)