The Best Smart Rings to Rule Them All

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the best Smart ring slips easily onto your finger to track your activity, health, and sleep—forget smartwatches and fitness trackers. No distracting screens, no huge watch banging you on the face while you sleep, and considerably less charging time make smart rings a smoother, more elegant way to keep tabs on your body with data regularly offloaded to your smartphone.

Once the preserve of wealthy wellness fans, smart rings are becoming more affordable. Although our top pick is still the Finnish pioneer Oura with the Oura Ring 4 ($349), the company is now under pressure from upstarts like the Ultrahuman Ring Air ($349), established fitness-tracking brands like Amazfit, and even tech giants like Samsung. We expect to see more entrants ...