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Smart titanium ring with ECG and 8-day battery life: Circular Ring 2 versus Oura and Samsung Galaxy Ring

The Circular Ring 2 installs an ECG into a compact titanium housing. (Image source: Circular)
The Circular Ring 2 installs an ECG into a compact titanium housing. (Image source: Circular)
Circular's most advanced smart ring to date has arrived, not only with improvements in robustness and reliability, but also with brand new sensors. These include an ectrocardiogram (ECG) so that atrial fibrillation can be detected directly from the finger.

The Circular Ring 2 has a brand new design in which the sensors and battery have been seamlessly integrated into the round housing instead of having a flat edge on the inside like the previous model. This should improve wearing comfort, but the new ring does not have a vibration motor for haptic feedback, presumably due to a lack of space.

The ring is available in four colors, namely gold, rose gold, black and silver, while the titanium housing now has a slick high-gloss finish. The more robust housing and a completely redeveloped app are expected to eliminate some of the major criticisms of the previous models. At eight days, the battery life is the same as the Circular Pro and significantly longer than the Circular Slim.


While the complete technical specs are yet to be revealed, the manufacturer speaks of improved sensors and an integrated electrocardiogram, of which the latter is intended to detect atrial fibrillation. As is common with virtually all "smart" products in 2025, Circular also advertises a range of AI features, most notably the improved Kira+ AI assistant, which is designed to help users achieve their goals.

Price and availability

The Circular Ring 2 will be financed from February or March via a crowdfunding campaign, where the ring will have a price tag of $380. This makes the Circular Ring 2 slightly cheaper than the Oura Gen 3 and the Oura Gen 4.

Source(s)

Circular via Forbes & Android Authority

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2025 01 > Smart titanium ring with ECG and 8-day battery life: Circular Ring 2 versus Oura and Samsung Galaxy Ring
Hannes Brecher, 2025-01- 7 (Update: 2025-01- 7)