Oura Ring 4 at lowest price ever during Prime Day — under $215

The celeb-favored Oura Ring 4 is at its lowest price ever for Prime Day, starting under $215 — nearly half off the usual retail that can reach $500. Jennifer Aniston, Gwyneth Paltrow and Kim Kardashian are among those who wear it to monitor health stats and track sleep.

The ring is offered in a ceramic finish as well as metal options like gold, rose gold and silver. It reads more than 50 health metrics in its companion app, which provides daily reports and suggestions on stress, sleep score, workout recovery and other insights.

Users praise the ring’s durability, comfort and detailed sleep and activity tracking. Reviewers note it is lightweight enough for all-day wear and say the features — from basic heart rate and step counts to deeper sleep analysis — make the purchase worthwhile for many.

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