4 reasons Fitbit is being sued for inaccurate heart-rate monitors - EDN
Fitbit Targeted by Class Action Lawsuits Over Inaccurate Heart Rate Monitoring
Yet another study claims that Fitbit trackers are inaccurate | KitGuru
Fitbit Versa 3 Review | Recombu
Fitbit and Other Heart Rate Wristbands Often Inaccurate
Fitbit faces accusation of 'defrauding' customers with 'wildly inaccurate' heart rate tracking technology in lawsuit | The Independent | The Independent
Fitbit and Samsung heart rate monitors may be inaccurate on dark skin | VentureBeat
Solved: Heart rate monitor not accurate during exercise - Fitbit Community
Fitbit Sense In-Depth Review: All the Data Without the Clarity | DC Rainmaker