Samsung has added a 'lite mode' wireless update, that send updates (weather, health, weekly summary), every so often to the watch.
I have two watches, and I get one (or more) alerts each morning, once I start moving with both the watch (I'm wearing) and phone on my person.
The point being .. that this works without me enabling Wi-Fi or Bluetooth (or doing anything). I always have Wi-Fi disabled, and only enable Bluetooth when I intend to sync or update the watch.
I have assumed the watch enables Bluetooth briefly, then disables it again.
However, only the inbuilt Samsung 'weather' applet gets the data from the alert (it is not visible to Facer).
This would be incredibly useful, if it could update Facer with today's weather outlook, sunrise/sunset, and (for example) Steps target (eg. 6,500, 4,000, or 10,000), or (long term wishlist) GPS long./lat., city / locale name, etc. All this information is already on my smartphone, and this 'lite' update method has no apparent draw on the battery.
I also suspect that the method, and other recent / associated battery-saving apps suspension, etc. are a possible root cause for this (and similar issues).
Perhaps we can turn this into a win ..