Good morning from South Jersey warriors.
The technology has not received approval by any country in the world because of the inaccuracies. A cgm is less accurate than a finger stick and this tecnology is significantly less accurate than a cgm. But lack of approvals and inaccuracies does not stop China from producing them.

We have tried 2 separate blood glucose smart watches for a week between my Bride and me.
They can show trends, but are quite inaccurate. My Bride is not diabetic.

I keep my numbers in a very tight range, TITR. My numbers are 5.7(103) to 7.5(135). Both smart watches report numbers from 2.7 to 8.8. In fact I can take 2 readings within a minute and one can read 3.3 and the next 6.8, but the readings are usually within 1 mmol/L. It only reads in mmol/L

But the blood pressure was somewhat more static and closer to being accurate. It almost always reads about 120/80, whether my bp is 115/75 (medicated) or 150/100 (unmedicated).

The pulse rate, pulse Ox, and body temperature were spot on.

I haven't tried the ecg yet.

The larger one is easier to use and has a nicer display.

Do they have useful information - Yes. Is the data they provide other than blood glucose useful, somewhat yes.

Is the blood glucose numbers useful. Yes and No.

For a nondiabetic with a self correcting system, probably.

For a diabetic, who will make treatment decisions based on the information --- a definitive NO. They are still just a novelty.

They can be dangerous.

I was wondering about this myself