While Oura has largely dominated the smart ring market for years, a growing number of rivals are now racing to dethrone it by trying all sorts of approaches to get an edge over it.

Circular Ring 3 Slim and Pro add non-invasive glucose insights, contactless payments, haptic alerts, and up to 12 days of claimed battery life per charge.

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The Circular Ring 3 series announcement comes amid a year of heightened competition in the smart ring market, following the launches of the Oura Ring 5 and RingConn Gen 3.