The Apple Watch hates tattoos: An expert explains why

The Apple Watch’s wrist detection and pulse measurement features often fail to work when confronted by dark tattoos. Michael Lovell made the video below illustrating the problem and a Reddit user called Guinne55fan flagged up the same issues. Reddit also produced an explanation about why the technique used by Apple – pulse oximetry – leads the device to end up befuddled by beautiful body art and not simply darker skin in general: Comment from discussion Anyone with tattoos and the watch please read.. I asked Dr Sijung Hu, Leader of the Photonics Engineering and Health Technology Research Group at Loughborough University’s…

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