> I can make a pretty accurate guess each morning based on how I feel.

So you don’t actually need the ring? :)

This is actually a serious question: I would want to use a smart ring for the things I can’t tell by myself. But then I also can’t judge the accuracy and consistency of the corresponding measures.

I can estimate a portion of rice within about 5-10% without a scale, but I needed the scale to learn what the portion was in the first place.

same thing applies to the ring!