Fitbit Sleep Tracker Accuracy: What you should know - Digital Health Central
Three Things Fitbit Does Better Than Apple
Fitbit Estimated Oxygen Variation: We explain SpO2, sleep apnea and blood oxygen - Wareable
John O'Reilly on Twitter: "Noticed this for first time in Fitbit app (using Charge 3)... Not sure how long it's been available. https://t.co/oCOm0ulaVf" / Twitter