Oura Ring 4 Black Size 5 — Sleep, Activity & Women’s Health AI Advisor | Up to 8 Days Battery

Meet Oura Ring 4, the next evolution in personal health awareness. Crafted with a durable all-titanium body and powered by Smart Sensing, this smart ring goes beyond basic metrics to deliver continuous data across more than 50 health indicators. Explore sleep quality, daily activity, readiness, heart health signals, stress patterns, metabolic cues, and Womens Health metrics—all while enjoying a discreet, comfortable design you can wear day and night. With a battery life of up to eight days and a screen-free experience, you can stay connected to your data without distraction. When you own multiple finishes, you can switch between styles in the Oura App, keeping your look fresh while maintaining seamless data continuity.

Key benefits in daily life

The ring’s adaptive sensing platform personalizes insights over time, helping you notice patterns that matter to your routine. Use the data to guide sleep routines, plan active days, and understand how different activities influence your energy levels. The first month of Oura Membership is included for new members, with ongoing options available through the app. Oura Ring 4 is compatible with both Android and iOS devices, and eligible purchases can be made through HSA or FSA funds for select items.

What you can track

• Sleep quality, duration, and consistency
• Daily activity and movement patterns
• Readiness and recovery signals
• Heart rate trends and resting variations
• Stress exposure and recovery balance
• Metabolic health cues from body signals
• Womens Health metrics for cycle-related insights

How it fits your life

The Oura Ring 4 stays on comfortably with a sleek, screen-free design that blends into everyday wear. Enjoy up to 8 days of battery life between charges, supporting workouts, commutes, and evenings out without frequent recharging. With multi-ring support, you can switch finishes to match your style, while keeping your health data consistent across looks in the app.

Size, setup, and value

• Accurate sizing requires the dedicated Sizing Kit before purchase
• Interchangeable finishes let you rotate styles without buying new rings
• First month of Oura Membership included for new users
• Oura Ring and accessories are eligible for HSA/FSA funds where applicable

Real-world scenarios

From early-morning routines to post-workout relief and winding down at night, Oura Ring 4 is designed to feel almost invisible while gathering meaningful data that can inform your daily choices. Consider it a subtle companion rather than a device you notice—until you start seeing patterns you find useful.