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CES 2025: Circular Ring 2 detects irregular heartbeats in real time

The ring utilizes an FDA-cleared atrial fibrillation (AFib) detection algorithm, allowing it to monitor and detect irregular heartbeats

byKerem Gülen
January 6, 2025
in News, Tech
Home News

At CES 2025, Circular unveiled its second-generation smart ring, the Circular Ring 2, enhancing the smart ring buying experience with a new phone-based sizing system, which eliminates the need for plastic sizing kits. Available for $380, the device will be on sale in February or March 2025.

“With the Circular Ring 2, we’ve reimagined what a smart ring can be—combining advanced health technology with timeless design and unmatched durability,” stated Cirucular CEO Amaury Kosman in a press release. “This isn’t just a wearable; it’s a statement piece that empowers our users to take control of their wellness without compromising on style.”

Circular Ring 2 features and design

The Circular Ring 2 includes several upgraded features such as a longer battery life, improved health tracking, and a titanium build. It boasts a battery life of up to eight days per charge, even with continuous health monitoring, including detailed sleep analysis. The ring is designed with four color options: Gold, Rose Gold, Silver, and Black, and features enhanced sensors for better tracking accuracy, including ECG capabilities.

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Notably, the ring utilizes an FDA-cleared atrial fibrillation (AFib) detection algorithm, allowing it to monitor and detect irregular heartbeats. According to Circular, the Ring 2 offers “real-time insights with precision,” enabling users to remain proactive about their health.

Circular introduces the Digital Ring Sizing feature, which allows customers to measure their ring size using a smartphone camera, thereby streamlining the ordering process and reducing waste. Users simply need to place their hand below a card, such as a credit card, for the system to detect the size of their finger. However, initial tests indicate the algorithm may require further refinement, as it inaccurately detected a size 9 for a size 10 finger.

Additionally, the companion app has been redesigned to reflect the ring’s luxurious aesthetic and provide a more intuitive user experience. This app aims to resolve past complaints regarding the usability and data transfer reliability of the previous model, the Circular Ring Slim.

The Circular Ring 2 is positioned as a competitor against existing smart rings like the Oura Ring 4, which costs $349, and offers similar battery life and health tracking features, but without subscription fees.


Featured image credit: Circular

Tags: Featured

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