A study finds the pulse technology in Fitbit heartbeat trackers was off 20 beats per minute, on average
The study was funded by the legal team behind a lawsuit
Other studies have looked at the accuracy of the devices and found mixed results
Your favorite fitness tracker may not be totally accurate, according to a study used in an amended complaint filed Thursday against Fitbit.
The class-action lawsuit, filed earlier this year, argues that the PurePulse technology used in the Fitbit trackers that measure your heart rate doesn’t do it as well as the company’s marketing material promises, a claim Fitbit denies. The technology is used in the more expensive models of the device, the Surge, Blaze and Charge HR.
The lawsuit was filed on behalf of people who bought these Fitbits specially to help them track their heart rate, whether for health reasons or to make sure they are getting the most out of their workouts.
“We are not arguing that it is a medical device. I think that is irrelevant,” said Jonathan Selbin, one of the attorneys who filed the lawsuit. “This is about the way they market it and that they charge a premium for the heart rate monitor, but it’s not giving a meaningful measurement.”
The suit alleges that a defect in the trackers is a safety hazard because people who rely on inaccurate heart rate readings for medical purposes could be at risk. The class-action members say there is no reasonable way for them to kn