The Fitbit Charge 6, the latest addition to Fitbit's lineup of fitness trackers, has introduced a significant advancement in health monitoring with its built-in blood oxygen saturation (SpO2) feature.

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Good Fitbit news tends to be outweighed by the bad these days, but Fitbit Charge 6 owners have a reason to feel happy as it has just received a handful of new features. The key substantive change if ...