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My series 6 consistently said I had 4 minutes more sleep time than in bed time, and neither really noticeably tracked anything. Our a and Fitbit sleep tracking might not be truly accurate, but at least they’re semi plausible.


The series 9 is best in class for sleep accuracy: https://www.youtube.com/watch?v=Jr4p66vSmLY (18:20 mark)

We're now four generations of Apple Watch beyond yours.




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