I’m currently testing the Circular Ring 2, a subscription-optional smart ring that boasts eight days of battery, ECG readings, AFib detection, and a revolutionary new digital sizing process. While the jury is still out on its data accuracy, my initial impressions of the Circular Ring 2 are positive.
Of course, when assessing what could be one of the best smart rings in 2025, it’s impossible not to compare it to the Oura Ring 4, our hands-down favorite finger wearable available right now.
