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Masimo — the company that got the Apple Watch banned — has unveiled its new smartwatch
(www.tomsguide.com)
This is a most excellent place for technology news and articles.
I really like Garmin for this. Lots of models to choose from to find your niche (eg, they have running focused, scuba diving focused, or just looks like a regular watch with no gps). What's cool is their ecosystem is NOT to do much smartwatch stuff. It's all about health focus. Or maybe fitness focus I guess.
Edit: oh I reread and saw you want blood pressure. They don't do this that I know of.
Garmin is also the only fitness tracker that isn't just like explicitly selling your data. But then again who's to say that won't change tomorrow.