Research: Read the Docs/Release Notes on Apple Developer Website!

Probably the _first_ thing we should do is:
- [ ] **Read the _Official Docs_** to see how good they are and determine if we even _need_ anything else ... https://developer.apple.com/library/content/releasenotes/General/WhatsNewInwatchOS/Articles/watchOS3.html
- [ ] Summarise the findings on the features we _need_ to have.

Open the linked watchOS 3 release notes on the Apple Developer website and read them for the project's intended Apple Watch features. Summarize the findings and identify the features the project needs; completion means the summary and required-feature list are recorded in the project's documentation or issue discussion.

Written by the indexing model from the issue text.