Introducing Oura Ring 4, the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn't just measure your biometrics, it adapts to you, providing insights into over 30 biometrics including sleep, readiness, activity, heart health, metabolic health and women's health. Oura Ring quietly and comfortably monitors your health and with up to 8 days battery life — you can even forget it's on.
Sleeker, smarter and more accurate than ever, Oura Ring 4 is made for you
Oura Ring 4 sizes are different from standard ring sizes and Oura Ring Gen3 sizes. It’s important to find your size before you purchase Oura Ring 4. Find your size by purchasing an Oura Ring 4 Sizing Kit on Target.com.
1. Purchase the Oura Ring 4 Sizing Kit.
2. Learn your Oura Ring 4 size by wearing a sizing ring for at least 24 hours.
3. Purchase your Oura Ring 4 online or in a Target store near you.

Top Features
•SLEEP - Get the best sleep of your life, and then some. Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Oura provides insights into your sleep staging throughout the night, blood oxygen levels, HRV, and nighttime heart rate.
•ACTIVITY - Whether you're running a marathon or running errands, Oura tracks your daily activity, steps, calories burned, and workouts while helping you strike a balance between movement and recovery.
•READINESS - Know when to push it and when to take it easy with the Oura Readiness Score. It takes into consideration over 30 different body signals — including temperature, heart rate, HRV, and sleep — to tell you how ready you are for the day ahead.
•STRESS - Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practices and how to recover from longer-term stressors.
•WOMEN’S HEALTH - Your cycle impacts your mood, sleep, activity, and more, every day. Oura helps you understand how your cycle affects your body, so you can make better, informed decisions about your holistic health. Track the changes in your body throughout your cycle and predict your period up to 30 days in advance.
•HEART HEALTH - From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age, and Cardio Capacity, Oura helps you take care of one of key indicators of your overall health — your heart.
•ILLNESS DETECTION - Oura monitors shifts in your temperature and heart rate so you can tell when you may be getting sick sooner.

Looking for the best health tracker? Whether you’re searching for a sleep ring or fitness ring, Oura Ring is for you— this revolutionary smart ring that allows you to discreetly track your sleep, activity, recovery and stress, in style.