Apple

To all the people asking for blood pressure monitoring, can you point to a device that has this feature as part of a smart watch/fitness tracker? What are you all talking about?

Personally, my most realistic wanted feature would be ambient (room) temperature readings.

My dream feature would be solar charging/capture.

And rest days. Apple already includes them as part of competitions, so I'm not sure why they are struggling to include this in personal fitness tracking.