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As it's also PPG the base issues remain the same, but I quite like the location and form-factor. Plus the team behind it came out of Polar, and the algorithms aren't bad.
(Its probably the one I would go for, if I didn't already have an Apple Watch)If you want a proper deep dive into the limitations and the algorithmic basis for what either are doing:
https://peterhcharlton.github.ioIf you really want a deep dive there are two dev kits- one from Sony and one that is based of the ESP architecture and git has plenty of code to harness to even do cuffless Blood pressure.
Aldosterone
Do you have an educated view on Oura, H?