The smart wearables market is evolving rapidly, with rings emerging as a popular form factor for health tracking. Circular, a relative newcomer to the scene, has just launched pre-orders for its second-generation smart ring - the Circular Ring 2. This new device aims to compete with established players like Oura and Samsung by offering some unique features.
FDA-Cleared ECG Monitoring
The standout feature of the Circular Ring 2 is its FDA-cleared electrocardiogram (ECG) capability. This allows users to take on-demand ECG readings directly from their finger, potentially detecting irregular heart rhythms like atrial fibrillation (AFib).
How it works:
- Place your finger on the ring’s sensor for 30 seconds.
- The ring records your heart’s electrical signals.
- The companion app analyzes the data for signs of AFib or other arrhythmias.
This level of heart monitoring was previously only available in smartwatches, making the Circular Ring 2 a pioneer in the smart ring space.
Digital Ring Sizing
One of the most frustrating aspects of buying a smart ring is getting the right size. Circular aims to solve this with a novel digital sizing approach:
- Download the Circular app on your smartphone.
- Follow the in-app instructions to measure your finger using your phone’s camera.
- The app determines your ideal ring size.
This eliminates the need for plastic sizing kits, reducing waste and streamlining the ordering process.
Advanced Health Tracking
Beyond ECG, the Circular Ring 2 offers a comprehensive suite of health monitoring features:
- 24/7 heart rate monitoring
- Blood oxygen (SpO2) tracking
- Sleep stage analysis
- Stress level assessment
- Activity tracking
The ring uses a dual PPG (photoplethysmography) sensor to capture these metrics continuously throughout the day and night.
Women’s Health Features
Circular is expanding into women’s health tracking with the Ring 2, offering:
- Menstrual cycle tracking
- Temperature monitoring for fertility insights
- Menopause symptom tracking
These features aim to provide a more holistic view of women’s health, competing with dedicated fertility trackers and apps.
AI-Powered Insights
The Circular Ring 2 pairs with a smartphone app featuring an AI assistant named Kira. This system analyzes your health data to provide personalized insights and recommendations. For example, Kira might suggest adjusting your sleep schedule based on your activity levels and heart rate variability patterns.
Battery Life and Charging
Circular claims the Ring 2 can last up to 8 days on a single charge, putting it on par with competitors like the Oura Ring. The ring comes with a wireless charging case, allowing for convenient recharging without fumbling with small cables.
Design and Materials
The Circular Ring 2 is crafted from titanium, available in four finishes:
- Gold
- Silver
- Rose Gold
- Black
Weighing just 4 grams, it’s designed to be comfortable for 24/7 wear.
Pricing and Availability
Pre-orders for the Circular Ring 2 are now open through a Kickstarter campaign. Early backers can secure the ring at a significant discount:
- Super Early Bird: $239 (limited quantity)
- Early Bird: $279
- Kickstarter Special: $329
The retail price is expected to be $549 when the ring launches to the general public. Shipments are scheduled to begin in June 2025.
The Circular Ring 2 is shaping up to be a strong competitor in the smart ring market. Its ECG capabilities and innovative sizing approach could give it an edge over established players. However, as with any crowdfunded product, potential buyers should be aware of possible delays or changes before committing their money.