Oura Ring 4 - Black, Size 9 | Sleep, Activity & Women’s Health AI Advisor

Meet Oura Ring 4

The Oura Ring 4 represents the latest evolution in wearable health sensing. Crafted in a durable all-titanium design, it blends comfort with smart features that adapt to you. Powered by Smart Sensing, it tracks more than 50 health metrics and translates daily patterns into actionable insights for sleep, activity, and overall wellness. With up to eight days of battery life and a design you can wear daily, it’s built to stay discreet on your finger while you focus on the moments that matter.

What it measures

• Sleep duration and quality to help you plan your nights and mornings
• Activity levels and readiness to guide your daily routines
• Heart health indicators and recovery signals for balanced days
• Stress and metabolic health markers to understand how you respond to stressors
• Women’s health metrics for cycle-aware wellness and context

Smart Sensing in action

Smart Sensing adapts to your habits, delivering continuous data day and night without interrupting your routine. The ring’s passive wear design reduces distractions while providing consistent tracking across activities, sleep, and rest periods.

Comfort, fit, and style

• All-titanium construction combines durability with a lightweight feel
• Discreet, screen-free wear that blends with everyday outfits
• Up to 8 days of battery life for extended wear between charges
• Multi-ring support lets you switch finishes easily in the Oura App

Size, fit, and setup

• Accurate sizing uses the dedicated sizing kit to find your perfect fit
• Unique sizing differs from standard jewelry rings; take your time to measure
• Android and iOS compatibility makes pairing straightforward

Membership and eligibility

• First month of Oura Membership included for new members
• Afterwards, membership is 5.99 per month and ties to your Oura App account
• HSA/FSA eligible for Oura Ring, additional chargers, and shipping

Real-world use scenarios

Imagine waking to a concise readiness score, planning a light workout after a restful night, or monitoring cycle-aware signals during a busy day. The ring offers data-driven insights you can act on—without promising specific outcomes. The possibilities depend on your routines and goals.