Circular has introduced its latest smart ring lineup, the Circular Ring 3 series, which includes two models: the more feature-rich Circular Ring 3 Pro and the slimmer Circular Ring 3 Slim. Both rings support NFC contactless payments and include health monitoring tools. The Ring 3 Pro adds advanced health features such as blood pressure monitoring and ECG (electrocardiogram) capabilities, while the Ring 3 Slim offers basic health tracking, haptic feedback for alerts, and NFC support without the advanced medical functions. The Circular Ring 3 Pro is designed to integrate health, wellness, and daily convenience into one wearable device. It includes an FDA-cleared ECG heart sensor, which can detect irregular heart rhythms, and tracks activity levels and sleep patterns. Additional features include haptic feedback vibrations for health alerts and silent wake-up alarms that can be set through a companion app. The ring supports contactless payments using VISA and Mastercard, making it a versatile tool for everyday use. Constructed from plated titanium, the Ring 3 Pro is lightweight, weighing between 3-4 grams depending on the size. It offers up to 12 days of battery life, with an additional 5-6 charge cycles when used with its accompanying charging case. The Ring 3 Slim is slightly thinner, by about 0.5mm, and is likely aimed at users who prioritize comfort and style over the most advanced health features. The Circular Ring 3 series is positioned as a competitor to the Oura Ring 5, a well-known smart ring that focuses on health monitoring. However, previous models from Circular, such as the Ring 2, faced criticism for software issues like unreliable syncing, incomplete features, and a confusing app interface. For the new series to succeed, Circular must improve these aspects to effectively compete with established brands like Oura. While the ECG feature in the Ring 3 Pro is FDA-cleared, its blood pressure monitoring uses LED technology, a method also recently adopted by companies like Apple, Huawei, and the makers of the Vital Signal Ring. Other devices that claim to monitor blood pressure often rely on extrapolating data from other metrics, with varying degrees of accuracy. Pricing and pre-order details for the Circular Ring 3 series have not yet been released, so more information is needed before the product can be fully compared with other leading smart rings.