Circular Ring 3 Pro

An ECG Sensor Wrapped Around a Finger

The Circular Ring 3 Pro brings an FDA-cleared single-lead ECG to a smaller titanium design. It can screen for atrial fibrillation while also following heart rate, heart-rate variability, blood oxygen, sleep, and skin temperature. Circular adds blood-pressure trends and non-invasive glucose insights for a broader view of changes over time.

Payments Join the Health Sensors

An integrated NFC chip lets the ring make contactless purchases with supported Visa and Mastercard accounts. That is still unusual among smart rings, including larger competitors that focus entirely on wellness. It turns a screenless tracker into something useful at a checkout even when the wearer's phone and wallet stay put.

Vibrations Return for Private Alerts

A haptic motor in the inner rim can wake the wearer silently, issue medication reminders, flag vital readings, or guide breathing exercises. These physical cues keep the ring from being a passive data collector that requires constant app checks. Circular's Kira assistant analyzes the recorded information and offers personalized recommendations without a required core subscription.

Twelve Days in a Full Titanium Body

The Pro measures 6.8mm wide, weighs roughly three to four grams depending on size, and resists water to 50 meters. Battery life reaches up to 12 days, followed by wireless charging. Circular expects the Ring 3 Pro in early 2027, with pricing and preorder details due later.