Circular wants to end that particular indignity. The Paris-based company announced its Ring 3 Series at IFA Berlin on September 3, 2026 — two models, the Pro and Slim, built around a single idea: your ring should pull double duty as a health monitor and a contactless payment device. Pricing and availability are expected in early 2027.
Two Rings, One Clear Split
The Pro and Slim share a core feature set but split decisively on sensor depth and physical size.
The Pro is the full-send option. It packs FDA-cleared ECG for AFib detection, blood pressure trend tracking, glucose monitoring (framed as a wellness indicator — not a diagnostic tool, worth noting), and advanced sleep analysis, with up to 12 days of battery life. The Slim drops the advanced clinical sensors to stay smaller and lighter, running up to 10 days on a charge.
Both models share the features that actually matter for daily use:
- NFC contactless payments
- Haptic vibration for silent alarms, medication reminders, health alerts, and guided breathing exercises
- Titanium steel construction, 50-metre water resistance, and wireless charging
- Available in US sizes 6–14
- Slim retains heart rate, HRV, SpO₂, skin temperature, sleep, and activity tracking
That haptic feedback is underrated. A ring that taps your finger instead of lighting up your wrist during a meeting is genuinely useful — the kind of feature that sounds minor until you’ve lived with it.
What’s Still Missing From the Picture
The hardware pitch is compelling on paper, but critical commercial details remain unconfirmed.
Kosman has said that Circular’s goal is to make wearables more useful throughout the day — not just health-data collectors you check at night. The spec sheet supports the ambition: titanium construction, serious water resistance, and payments baked in alongside biometrics, all in a form factor that fits on your finger.
But tap-to-pay has become as reflexive as unlocking your phone post-pandemic, and that normalization raises the bar for any new entrant. Whether the Ring 3 Series actually delivers on NFC payments depends entirely on which banks and payment networks are supported at launch — details Circular hasn’t confirmed yet. Smart-ring adoption is growing, but payment compatibility is where wearable ambitions most often stall in practice.
No pricing. No confirmed launch markets. No payment compatibility list. Circular has built a compelling pitch on paper, and the Ring 3 Series is the most ambitious product the company has announced since its founding in Paris in 2019. The real verdict waits until preorders open sometime in early 2027, when the spec sheet meets the checkout line.
