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Masimo's blood-oxygen smartwatch matters beyond the Apple Watch ban — even if you won't buy it

Apple's banned SpO2 data isn't especially accurate, and most rival watches aren't any better. Masimo could change the status quo.

Unless you're someone with documented sleep apnea, you won't spend a grand on a tracker dedicated to blood oxygen data. Plus, a 2022 lawsuit alleged that the Apple Watch's blood oxygen sensor is "racially biased against people with dark skin tones," as reported by ABC News. He's also completed marathons like NYC, SF, Marine Corps, Big Sur, and California International — though he's still trying to break that 4-hour barrier.

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