Oura Ring Gen 3 - sleek, titanium smart ring tracking sleep, activity, and recovery with advanced sensors for heart rate, temperature, and blood oxygen (SpO2), offering personalized health insights through its app, including stress, menstrual cycle insights, and guided content, requiring a subscription but providing long battery life and a minimalist design without wrist notifications, designed for 24/7 wear for comprehensive wellness monitoring. Advanced Sensors: Uses green, red, and infrared LEDs, plus NTC temperature sensors, to capture detailed biosignals. Comprehensive Tracking: Monitors sleep stages (deep, light, REM), resting heart rate, heart rate variability (HRV), body temperature trends, respiratory rate, and SpO2 during sleep. Activity & Recovery: Tracks daily movement, workouts (with post-activity analysis), and provides a Readiness Score to gauge your body's capacity for the day. Women's Health: Offers period prediction and cycle insights based on temperature changes. Stress Management: Helps identify stress patterns through biometric data. Durable & Lightweight: Made from titanium, available in styles like the seamless Horizon. Water Resistant - showering, swimming, and water activities (up to 100m). 24/7 Wear: Worn on the finger, ideally with sensors on the palm side, for continuous data collection. Syncs with the app to provide scores (Sleep, Readiness, Activity) and personalized guidance.