I’m aware of them. I’ve never been comfortable with sleep tracking apps or wearables. I refuse to rely on technology for something that my body is perfectly capable of doing on its own. After decades of life, I’ve figured out what works best for me. I don’t oversleep, because I get up the moment my alarm goes off.
Any time I’ve brought it up everybody glazes over the first time I say the words “instance” or “federated.” I’ve tried the email analogy, but they lose interest immediately.