> [Smart] watch include UV dosimeter functionality

This is actually a fucking great idea!

I presume, the location and orientation variation at the wrist probably makes for a good baseline exposure measure.

Quite honestly, either direction would be super useful data. Would be nice to get a warning/notification for too much, or too little sun exposure. Long term pooled population data would be invaluable, too.

Also, while we're at it, please throw in an actual dosimeter, x-ray/particle detector too. Not that useful now, but very, very cool, and who knows, if we have to fight giant cockroaches and stuff in the days to come.