A Florida man has filed a lawsuit (PDF) against Fitbit, saying the company’s claims that its devices can track sleep are false.
The plaintiff, James Brickman bought a Fitbit Flex in 2013. His case is seeking class-action status, hoping to represent consumers who bought any of Fitbit’s line of products that include sleep-tracking technology. Those models include the Fitbit Force, Flex, One, and Ultra and 2nd-generation devices like the Charge and Surge.
The suit says that Fitbit devices “consistently overestimated sleep by 67 minutes per night,” as compared to polysomnography, the most accurate type of tracking used by sleep scientists. Compared to actigraphy, a less-accurate measure, the Fitbit still overestimates by 43 minutes per night.
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