Circular Ring 2 (model CR2) vs Ultrahuman Ring Pro

Buyers who want a titanium ring with an ECG sensor, paid for once with no required subscription, in a choice of four finishes from $349, and who are willing to order the $5 sizing kit and wait for it before the ring ships.

You lift weights or carry heavy loads with a ring on; you want to wear it in a sauna or in the sea; you expect contactless payments, which the Ring 2 specification does not list; you need one settled battery or charge time figure before buying; or you would rather wait for Ring 3 pre-orders in December 2026.

Buyers who want ring-form sleep, HRV, and recovery tracking with no subscription and a long 15-day battery, now that the Ring Pro is US-available.

You already have years of Oura history you do not want to leave, or you want the longest peer-reviewed validation record (Oura).

Which is better, the Circular Ring 2 (model CR2) or the Ultrahuman Ring Pro?

We have not scored these two head to head, so this page does not name a winner. The Circular Ring 2 (model CR2) starts at $349 and the Ultrahuman Ring Pro at $479. The per-buyer recommendations below say who each one suits.

How much do they cost?

Circular Ring 2 (model CR2): $349 to $549. Ultrahuman Ring Pro: $479. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

Circular Ring 2 (model CR2): Buyers who want a titanium ring with an ECG sensor, paid for once with no required subscription, in a choice of four finishes from $349, and who are willing to order the $5 sizing kit and wait for it before the ring ships. Ultrahuman Ring Pro: Buyers who want ring-form sleep, HRV, and recovery tracking with no subscription and a long 15-day battery, now that the Ring Pro is US-available.