No, they can't measure blood pressure accurately.
American Heart Statement: "currently available devices may be inappropriate for clinical use." and "using these devices to guide treatment could lead to inappropriate care and may pose safety risks to patients." @American_Heart
https://www.ahajournals.org/doi/10.1161/HYP.0000000000000254?utm_campaign=sciencenews25-26&utm_source=science-news&utm_medium=phd-link&utm_content=phd-12-11-25 open-access

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