The sensors in the Oura Ring have been tested against laboratory results in multiple validation studies. Learn more about Science & Research at Oura.

Wearables differ in where they're worn, the sensors they use, and how they process data. For the most consistent and meaningful insights, it's best to track trends and changes over time within your Oura Ring and Oura App, rather than comparing your Oura results to those from other devices.

Oura Ring is water-resistant up to 100 meters (~330 feet), meaning that you can wear it while showering, swimming, or partaking in recreational diving (e.g. snorkeling), but we don’t recommend using your Oura Ring while scuba diving or keeping it submerged underwater for over 12 hours. Chlorine will not damage it.

Oura Ring operating temperature ranges from -10–52°C / 14–125°F. You can safely wear your Oura Ring in the shower, hot tubs, saunas, ice baths, and cryotherapy tanks. However, extended exposure to extreme temperatures (below -20°C / -4°F or above 60°C / 140°F) may lead to battery damage.

Oura Ring gives a complete picture of your health through essential health metrics, including:

• Readiness
• Sleep efficiency
• Activity
• Daytime Stress and Resilience
• Heart Health: Cardiovascular Age and Cardio Capacity
• Women’s Health: Cycle Insights, Fertile Window, and Pregnancy Insights

Oura Membership unlocks the full potential of the Oura App, allowing you to access detailed insights and personalized guidance. Without a membership, the Oura Ring can be used only with limited functionality.

We recommend you use an Oura Ring Sizing Kit before selecting your Oura Ring size. The kit includes plastic ring sizers corresponding to Oura Ring sizes, which differ slightly from standard ring sizes (note: half sizes are not available).

For accuracy, wear the ring sizer for at least 24 hours, including while sleeping, before finalizing your size. If you’re between sizes, we recommend choosing the smaller size for a more secure fit. Visit our Sizing Page for more information.

Alongside Silver, the device is available in a range of finishes including Brushed Silver, Rose Gold, Gold, Stealth, and Black. You can explore each color on its respective product page.

Yes, in fact, Oura Ring 4 makes a thoughtful gift for loved ones who want to track their health and wellness. When purchasing for someone else, it’s important to know their correct ring size, which you can determine using the Oura Ring Sizing Kit. 

Oura Ring 4 is best for anyone who wants comprehensive health insights without the distraction of screens, notifications or constant charging. It’s ideal if you’ve found other wearables too intrusive or if you prefer discreet, passive tracking that fits seamlessly into your routine. Whether you’re prevention-focused, transitioning to more mindful health habits, or simply want a device that’s comfortable to wear, Oura quite literally adapts to you.

Oura Ring 4 pricing depends on finishes. Silver and Black models start from SGD 529, Brushed Silver and Stealth from SGD 599, and Rose Gold and Gold from SGD 749. For Oura Ring price updates and special offers, follow WEAREREADY.SG on Instagram and subscribe on our website.

Oura Ring 4 can be purchased online at WEAREREADY.SG, with the option of either pickup or delivery. Check our website for current availability — pickup is typically possible within 24 hours, while delivery within Singapore usually takes 2–3 business days, plus 1–2 days for shipping. If you are ordering from overseas, please contact us directly.

Oura Ring is widely known as the best smart ring for its ability to translate data into guidance. While a smart ring can track metrics, Oura helps you understand patterns over time and shows you how lifestyle changes impact your body, making it easier to improve your health day by day, on your terms.

Heart rate measures the number of times your heart beats per minute, giving a snapshot of your cardiovascular activity with reliable heart rate accuracy. Heart rate variability (HRV) measures the variation in time between each heartbeat. Oura Ring 4 tracks both to help you understand how your heart is performing day and night.

Smart rings are wearable devices worn on your finger that combine compact design with built‑in health features to continuously monitor your body’s signals. While most smart rings on the market track basic metrics like steps or simple heart rate, Oura Ring 4 goes further with detailed sleep staging (wake, light, deep, REM), resting and daytime heart rate and HRV, skin temperature variation, blood oxygen levels, respiratory rate, activity and calorie tracking, and readiness scores. These metrics are all accessible through the app to help you understand how your body is performing around the clock.

You don’t need all the extra features to benefit from Oura Ring 4. Even as a dedicated sleep tracker, it provides detailed nightly insights, including sleep stages, recovery trends, and your body’s readiness right in the app, so you can wake up feeling refreshed. Hand in hand with overnight heart rate and blood oxygen levels, the ring is designed to help you spot patterns that impact your sleep quality and make adjustments to improve how well you rest. If you want, you also have the choice to tailor your focus and use Oura Ring 4 primarily for recovery and sleep tracking, adjusting insights and notifications to match your personal health priorities.

A wearable technology ring solves the biggest problem with wrist-based devices: most people take them off to sleep, charge them overnight, or find them too uncomfortable for 24/7 wear — which means you’re missing the data that matters most. While smartwatches and fitness trackers can only do so much when they’re sitting on your nightstand half the time, a smart ring is capable of capturing complete sleep cycles, overnight recovery metrics, and continuous heart rate data without interruption. It is the consistency of all-day, all-night tracking — combined with up to 8 days of battery life — that gives Oura access to the patterns and trends other wearables simply can’t see.

Oura Ring 4 gives you the complete cardiovascular picture you need to catch early warning signs, optimize training load, and manage recovery effectively — all from continuous, around-the-clock tracking that includes sleep. You get real-time feedback on how stress, activity and lifestyle choices are impacting your system, while metrics like Cardiovascular Age and VO2 Max help you track whether your interventions are actually moving the needle on heart health over time.

The more you know about how your body actually works, the easier it becomes to make changes that stick. When you know exactly how poor sleep affects your readiness the next day, or how stress builds up over time and hinders your recovery, you can address the root causes instead of guessing. Oura turns abstract health advice into concrete, personal insights — so you’re not just collecting data, you’re learning what your body needs and taking action on it.