Oura Ring 4 Black – Size 15 | Sleep, Activity & Womens Health | AI Advisor | Up to 8 Days Battery

Meet Oura Ring 4

Meet Oura Ring 4, a sleek all-titanium smart ring designed to stay with you 24/7. Powered by Smart Sensing, it adapts to you and collects data across more than 50 health metrics — from sleep depth to activity patterns and beyond. It offers a minimal, comfortable wear that blends into everyday life while delivering personalized insights.

Smart, Adaptive Sensing

Smart Sensing provides continuous, accurate insights day and night. The ring learns your baseline and helps distinguish normal variation from meaningful shifts — without screens or vibrations to interrupt your day.

What you’ll learn

Oura presents insights on wellness facets such as sleep quality, readiness, daily activity, heart signals, stress indicators, metabolic health, and women’s health metrics. The app aggregates data into actionable patterns you can explore over time.

• Sleep: night-by-night patterns, sleep stages, and restful moments
• Readiness: a daily score reflecting recovery and daily effort
• Activity: movement data and goal progress
• Heart health: resting rate trends and heart rate variability
• Stress and metabolic health: indicators and trends
• Women’s health: cycle tracking and cycle-related insights

Designed for real life

With up to 8 days of battery life, you can go longer between charges. The all-titanium build offers a premium, durable feel for daily wear, from workouts to evenings out. With multi-ring support, you can switch finishes in the app if you own more than one ring.

• Battery life: up to 8 days of daily use
• Comfort and durability: lightweight, water-resistant ring
• Sizing: use the included Sizing Kit to find your perfect fit
• Personalization: switch between finishes in the Oura app

Membership, pricing, and eligibility

The first month of Oura Membership is included for new members. After that, membership is 5.99 per month. The subscription is linked to your Oura account, not the ring itself. Some purchases may be eligible for HSA or FSA funds.

Android and iOS compatibility

The Oura Ring 4 works with both Android and iOS. Setup and syncing happen in the Oura app, making it easy to track trends across devices.

Note: this device provides personal insights and is not a medical device. Wear it comfortably and use the app as a guide to explore routines and patterns over time.