How accurate are sleep trackers? Lawsuit says Oura rings have 'a coin flip's chance of being correct'

I wore the world's first HDR10 smart glasses TCL's new E Ink tablet beats the Remarkable and Kindle Anker's new charger is one of the most unique I've ever seen I wore the world's first HDR10 smart glasses TCL's new E Ink tablet beats the Remarkable and Kindle Anker's new charger is one of the most unique I've ever seen How accurate are sleep trackers? Lawsuit says Oura rings have'a coin flip's chance of being correct' The class action lawsuit claims that Oura's sleep-tracking mechanisms sell'faulty AI-based inference as reliable science.' A lawsuit targets Oura's allegedly inaccurate sleep tracking features. The plaintiff alleges that Oura's sleep tracking has a coin flip's chance of being correct. Oura has defended its technology and methodology for its smart ring.