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Forget taking an electrocardiogram from your wrist; now you can take one from your finger. The Circular Ring Gen 2, which was announced on January 5 just ahead CES 2025it is one of the few smart rings that can detect atrial fibrillation. It is a feature that has become common smartwatches but it is still relatively rare on smart rings.
The new ring will be available for $380 in February or March after a crowdfunding campaign in January.
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Atrial fibrillation is a condition in which a person experiences an irregular heartbeat. It can increase your risk of stroke and other heart-related conditions according to the Mayo Clinic. It is estimated to affect 10.5 million American adults, or nearly 5% of the population, reports the University of California San Francisco. Circular says its Afib detection algorithm has been cleared by the US Food and Drug Administration.
Most Apple Watch models have been able to take an electrocardiogram since the Apple Watch Series 4 arrived in 2018, and the function has become more common on wrist-worn wearables in recent years. While popular smart rings such as those made by Oura and Samsung cannot detect Afib, Circular is not the first to put this functionality on your finger. Ultrahuman’s smart ring can measure the signs of the condition during the night.
The Circular Ring 2 will be available in gold, silver, black and rose gold and is made of titanium. It should last eight days on a single charge, and Circular says it’s also redesigned the ring’s accompanying app.
Circular’s new ring is another sign that the smart ring market is growing and becoming increasingly competitive with traditional fitness trackers and smartwatches.
Oura, widely regarded as the leader in the smart ring category, has released its latest model in October, which includes a new sensing system that should improve accuracy. Samsung, meanwhile, just launched his first smart ring in July 2024.
According to the International Data Corporationshipments of smart rings are estimated to grow by 88.4% in 2024, far outstripping growth in other categories such as watches, headphones and glasses.
Jack Leathem, a research analyst at Canalys, said in a previous interview that smartwatches could learn a thing or two from smart rings like those made by Oura.
“They’re actually pushing some innovation in the smartwatch fields,” he said. “And retailers need to catch up.”
