Oura Ring Gen 4 Review 2026: 90-Day Sleep Tracking Test Results
Tested the Oura Ring Gen 4 for 90 nights straight. Our detailed review covers sleep accuracy, battery life, new features, and whether it's worth upgrading from Gen 3.
Contributing Sleep Medicine Specialist
MD, Board-certified Sleep Medicine, AASM Fellow, 5,000+ patients treated
Dr. Patel is a board-certified sleep medicine physician who has treated over 5,000 patients with sleep disorders and reads SleepVerdict reviews with the same skepticism she applies to pharmaceutical sales reps. She's the reason we stopped recommending that one popular memory foam mattress — she flagged that its 'cooling gel' claims were thermodynamically impossible and the independent testing proved her right. She reviews every health claim on the site, vets our mattress firmness recommendations against actual spinal alignment research, and occasionally writes a strongly worded correction when Jordan gets too enthusiastic about a supplement that hasn't passed a double-blind trial. Her clinic in San Diego is booked four months out, which she mentions not to brag but to explain why her review turnaround times are terrible.
15 years of experience in sleep and mattress.
Tested the Oura Ring Gen 4 for 90 nights straight. Our detailed review covers sleep accuracy, battery life, new features, and whether it's worth upgrading from Gen 3.
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