Oura sold ₹29,000 sleep-trackers that can't track sleep, just give estimates: Lawsuit

Smart ring maker Oura has been sued in US for allegedly lying about its products' sleep-tracking capabilities. The lawsuit claims Oura rings can't measure any physiological signals needed to assess sleep quality and rely on AI-generated estimates that have "a coin flip's chance of being correct". Oura marketed the rings, sold for ₹29,000 in India, as being "built for accuracy".