Edit: Of course, that only works for people who would own one. People working third shifts might not be common in that set.
- Nasal breathing via a light-weight mask thing around your nostrils
- Heart rate and blood oxygenation via a pulse oximeter on a finger
- Physical orientation of the body (an acceleration sensor)
- Something around the chest that records contractions/expansions
Encouraging people to track their sleep would be awesome, but $130 is still completely out of reach for low wage workers. You can save up for a $400 phone or some other luxuries that bring joy into your life but $130 towards sleep tracking? Nobody will want to save towards that, and I'm not sure they should.
My idea if society wanted to tackle this issue would be for the government to step in and provide these smart watches to everybody, much like how some companies have giving fitbits to all their employees to promote more walking and awareness of sedentry. The US already spends $11k/person/year on healthcare, so a one-time cost of $130/person seems small and could even break even if it encourages people to be more active and helps with the obesity crisis.
Unfortunately because it would be the government promoting this, there will be people convinced that it's another device to spy on you through. I mean, it's a device constantly measuring your heartbeat and movement to see if you're sleeping or not. Some sherif would probably try to subpenea Garmin to see the heart rates of people suspected of a crime.
https://www.fda.gov/medical-devices/safety-communications/pu...
https://www.theverge.com/2020/10/7/21504023/apple-watch-ekg-...
> Blood oxygen monitors, or pulse oximeters, are considered Class II medical devices by the FDA. Generally, any company that wants to sell one in the United States has to submit documentation to the agency confirming that its product works just as well as other versions of the same product already on the market. There’s a workaround, though: if the company says that the product is just for fun, or for general “wellness,” they don’t have to go through that process. They can’t claim that it can diagnose or treat any medical conditions, but they can put it up for sale.
You might still use that as a cue that you should get tested for sleep apnea, but the watch itself isn't considered a medical device for measuring blood oxygen.