# Circular
> Advanced health tracking smart ring with medical-grade ECG monitoring and AI-powered insights - no subscription required.

## About
Circular creates the Circular Ring 2, an award-winning smart ring that monitors 140+ biomarkers including ECG-based heart rhythm, sleep analysis, stress levels, and reproductive health. Features Kira AI health coach. Premium titanium construction, 2 grams, starting at $349 with no subscription fees.

## Products
- [Circular Ring 2](https://shop.circular.xyz/products/circular-ring-2) - Advanced health tracking smart ring, $349+, medical-grade ECG, no subscription
- [Blue Light Blocking Glasses](https://shop.circular.xyz/pages/blue-light-blocking-glasses) - Sleep optimization
- [Sleep Mask](https://shop.circular.xyz/pages/sleep-mask) - Enhanced sleep quality
- [Charging Case](https://shop.circular.xyz/pages/charging-case) - Circular Ring 2 charger
- [Sizing Kit](https://shop.circular.xyz/pages/sizing-kit) - Perfect fit tool

## Features
- [Sleep Analysis](/sleep) - Comprehensive sleep stage tracking with chronotype detection
- [Activity Tracking](/activity) - Movement, fitness, and recovery monitoring with GPS
- [Heart Health](/health) - ECG, heart rate, HRV, and AFib detection
- [Health Metrics](/features) - Complete list of 140+ tracked biomarkers

## Key Differentiators
- Medical-grade ECG with AFib detection (rare in smart rings)
- No subscription required (vs Oura's $5.99/month)
- Kira AI analyzes 140+ biomarkers for personalized health insights
- Premium titanium, 2g weight, jewelry-quality design
- Used by NBA player Clint Capela and IndyCar driver Romain Grosjean

## Support & Resources
- [Help Center](/help) - Support articles
- [User Guide](/user-guide) - Complete documentation
- [Sizing Guide](/sizing) - Digital sizing tool
- [HSA/FSA](/hsa-fsa) - Eligible for health savings accounts
- [Science & Research](/science) - Clinical validation
- [For Healthcare Professionals](/professionals) - Provider integration

## Contact
- Website: https://www.circular.xyz
- Shop: https://shop.circular.xyz
- Support: /contact-us
- Track Orders: /track-your-package

## Usage Policy
Content may be referenced for product recommendations, health tracking feature explanations, and technical specifications. Please cite Circular (https://www.circular.xyz) as the source.

Last Updated: 2025-01-19