Circular announced the Ring 3 Pro and Ring 3 Slim at IFA 2026 in Berlin on September 3, 2026. TechCrunch’s report on the announcement and Wareable’s IFA coverage describe the same two-model plan: both rings are intended to combine health tracking with NFC contactless payments and haptic alerts worn directly on the finger.
The combination is more interesting than another increment in sleep and activity tracking. A payment credential and vibration motor would give the ring two jobs that do not depend on checking a screen: authenticate a purchase and deliver a private alert.
Those capabilities are not yet available to buyers. Circular has opened a waitlist and says preorders will begin in December 2026. It has not announced pricing or confirmed shipping dates. None of the reviewed reports documents an independently completed payment, battery test or health-validation test on production Ring 3 hardware.
What payments and haptics add
On its Ring 3 product page, Circular says users will be able to add a supported Visa or Mastercard in the company’s app and pay by holding the ring near a contactless terminal. Both the Pro and Slim are planned to include the NFC feature.
That could move a smart ring beyond passive sensing, but the announcement leaves important implementation details open. Circular has not published a country, bank or issuer compatibility matrix. It also has not explained the payment partner, credential-provisioning model, transaction limits or how the feature behaves when the ring or phone is offline.
Both models are also planned with a vibration motor. Circular describes silent wake-up alarms, medication reminders, guided breathing prompts and alerts when selected health readings move outside a user’s normal range. A tactile channel could make the ring useful when a phone is not in hand, but alert strength, reliability and battery impact have not been independently tested.
Ring 3 Pro and Slim make different hardware tradeoffs
Circular positions the Ring 3 Pro as the more capable health model. The company lists a width of 6.8 mm, a thickness of 2.78 mm and up to 12 days of battery life. Its announced feature set includes ECG readings, arrhythmia and atrial fibrillation screening, and blood-pressure trends.
The Ring 3 Slim removes the ECG and blood-pressure features in exchange for a smaller body. Circular lists it at 5.9 mm wide and 2.35 mm thick, with up to 10 days of battery life. It retains sleep, activity, heart-rate, heart-rate-variability, blood-oxygen and skin-temperature tracking, according to the company.
Both models are described as titanium steel rings with 50-meter water resistance, wireless charging, four finishes and US sizes 6 to 14. These dimensions, endurance figures and durability claims are manufacturer specifications, not independent measurements.
The health claims need careful boundaries
The most sensitive claims sit on the health side. Circular describes the Pro model’s ECG readings as cleared by the US Food and Drug Administration, but its Ring 3 page does not identify a clearance number or explain how the clearance applies to the new hardware. Independent reports repeat the description without supplying the regulatory record, so the precise clearance scope remains unverified here.
Circular also promotes blood-pressure trends for the Pro and “glucose insights” for both models. The company expressly describes the glucose feature as a non-invasive wellness estimate that is not intended to diagnose, monitor or manage diabetes. Buyers should not read the phrase as evidence that the ring directly measures blood glucose or can replace a medical device.
Subscription terms are also unsettled. Tom’s Guide’s interview with CEO Amaury Kosman reports that the new blood-pressure and glucose features will require a subscription. Circular’s current product page instead says subscription details will be confirmed alongside pricing. Until the company publishes final terms, neither a subscription-free promise nor a specific paid plan should be treated as established.
What to wait for before judging Ring 3
Circular says Ring 3 preorders will open in December 2026, with pricing announced at the same time. First-delivery dates remain unconfirmed. The waitlist is open, but this is still a pre-release product plan rather than a product readers can buy or a capability they can independently verify.
The payment feature needs a regional and issuer compatibility list, a clearer security model and evidence from completed transactions on shipping hardware. The health features need accessible regulatory records, validation data and exact subscription terms. Battery life, comfort, haptic strength and water resistance also need testing outside the company’s own material.
For hardware teams and wearable operators, the central design question is whether one ring can carry health sensors, a secure payment credential and a tactile notification channel without unacceptable compromises in thickness, battery life or reliability. Circular’s announcement proposes an answer. Shipping hardware, technical documentation and independent testing will determine whether it works.
