In today’s health-conscious world, having immediate access to vital wellness metrics is more important than ever. A smartwatch with an integrated oxygen sensor (SpO2) provides a window into your body’s recovery and overall well-being, tracking blood oxygen levels during workouts, sleep, and at high altitudes. This feature, once reserved for specialized medical equipment, is now a key component for anyone looking to get a complete picture of their fitness and health.
Our 2025 roundup is designed to help you find the perfect smartwatch that combines this advanced health monitoring with the features you need for your active lifestyle. From premium connected timepieces to dedicated fitness powerhouses, we have evaluated the top models on the market to bring you a list of the most reliable and feature-rich options available.
The Best Smartwatches with Oxygen Sensor in 2025
- Apple Watch Series 9 [GPS + Cellular 45mm] (Renewed)
- SAMSUNG Galaxy Watch 6 Classic 47mm Bluetooth (Renewed)
- Garmin Venu 3 Slate Stainless Steel Bezel 1.4-Inch AMOLED
- Fitbit Sense 2 Advanced Health and Fitness Smartwatch
- Amazfit Balance Smart Watch 46mm with Fitness Tracker
- Withings ScanWatch 2 – Hybrid Smart Watch
- POLAR Vantage V3, Sport Watch with GPS
- COROS PACE 3 GPS Sport Watch– Lightweight
- Fitbit Versa 4 Fitness Smartwatch with Daily Readiness
- Garmin Forerunner 965
Apple Watch Series 9 [GPS + Cellular 45mm] (Renewed)
The Apple Watch Series 9 stands as a powerful and intelligent health companion. Its powerful S9 chip enables a superbright display and new, intuitive ways to interact with your watch without touching the screen. This model includes advanced health, safety, and activity features that provide powerful insights when you need them most.
With cellular connectivity, you can send texts, make calls, and stream music directly from your wrist, even when your iPhone isn’t nearby. The carbon neutral design, when paired with a Sport Loop, reflects a commitment to the environment. It’s a comprehensive device for staying connected, active, and healthy.
SAMSUNG Galaxy Watch 6 Classic 47mm Bluetooth (Renewed)
The SAMSUNG Galaxy Watch 6 Classic combines a timeless design with modern smartwatch capabilities. Its signature rotating bezel offers a satisfying and precise way to navigate menus and notifications. This 47mm model includes multiple band sizes and provides advanced health insights right on your wrist.
Features like advanced sleep coaching and personalized heart rate zones help you understand your body’s rhythms and optimize your recovery. With always-on heart monitoring and comprehensive fitness tracking, it’s a robust tool for managing your daily wellness and activity levels.
Garmin Venu 3 Slate Stainless Steel Bezel 1.4-Inch AMOLED
The Garmin Venu 3 is a feature-packed smartwatch designed for those who take their fitness and connectivity seriously. Its vibrant 1.4-inch AMOLED touchscreen display is easy to read in any lighting condition. The built-in speaker and microphone allow you to take calls directly from your wrist when paired with your smartphone.
Beyond communication, the Venu 3 excels as a fitness tracker with its wrist-based heart rate monitoring and a wide array of animated on-screen workouts. It provides detailed insights into your health metrics, including blood oxygen levels, making it an excellent partner for a holistic approach to your well-being.
Fitbit Sense 2 Advanced Health and Fitness Smartwatch
The Fitbit Sense 2 is engineered to be your ultimate health companion, focusing on stress management and overall wellness. It uses all-day stress detection with cEDA and provides a daily Stress Management Score to help you recognize and address tension. The device also includes an ECG app for atrial fibrillation assessment and irregular heart rhythm notifications.
For sleep, it offers a personalized Sleep Profile, daily sleep stages, and a Sleep Score to help you improve your rest. Combined with SpO2 tracking and a health metrics dashboard, the Sense 2 gives you a comprehensive view of your physical and mental health.
Amazfit Balance Smart Watch 46mm with Fitness Tracker
The Amazfit Balance offers a comprehensive health and fitness analysis in a sleek package. It features expert sleep tracking that analyzes your heart rate, breathing, and nighttime temperature to show how recharged you are each morning. This data provides valuable insights into your mental and physical recovery.
For your workouts, the watch uses dual-band GPS for precise tracking and syncs with popular platforms like Strava and Google Fit. It also monitors key health metrics including heart rate, blood-oxygen saturation, and stress levels, sending alerts to keep you informed about your body’s status.
Withings ScanWatch 2 – Hybrid Smart Watch
The Withings ScanWatch 2 masterfully blends classic analog watch design with modern digital health tracking. Its stainless steel case and sapphire glass offer a timeless look and exceptional durability. This hybrid approach provides the aesthetic of a traditional timepiece with the smart capabilities you need.
Remarkably, it delivers up to 35 days of battery life on a single charge, allowing for uninterrupted daily and nightly health monitoring. Its health features are clinically validated, including a 30-second medical-grade ECG and continuous heart rate tracking with AFib detection, making it a serious tool for health-conscious individuals.
POLAR Vantage V3, Sport Watch with GPS
The POLAR Vantage V3 is built for the serious athlete seeking top-tier performance metrics. It features a sharp, bright AMOLED touchscreen display with customizable dashboards and widgets, putting your most important data front and center. The dual-frequency GPS provides superior accuracy for tracking your outdoor activities.
This watch offers the most comprehensive suite of training and recovery tools available, supporting over 150 different sports. From running to triathlon training, it provides everything you need to analyze your performance, avoid overtraining, and reach your fitness goals.
COROS PACE 3 GPS Sport Watch– Lightweight
The COROS PACE 3 is designed as the ultimate running watch, prioritizing comfort and performance. Its ultra-slim 11.7mm profile and featherweight 30-gram design (with nylon band) make it comfortable for 24/7 wear. You’ll hardly notice it’s there during your daily activities or longest runs.
It features an always-on 1.2-inch transflective touchscreen that is easy to read in direct sunlight. With an impressive battery life offering 38 hours of continuous GPS tracking or 24 days of daily use, the PACE 3 is built to keep up with the most demanding training schedules.
Fitbit Versa 4 Fitness Smartwatch with Daily Readiness
The Fitbit Versa 4 is designed to keep you motivated and accountable on your fitness journey. Its Daily Readiness Score helps you decide whether to work out or focus on recovery, preventing burnout and promoting balanced training. With built-in GPS and a workout intensity map, you can analyze your routes and effort with precision.
It tracks your all-day activity, 24/7 heart rate, and offers over 40 exercise modes with automatic detection. For sleep, it provides a personalized Sleep Profile, daily sleep stages, and a Sleep Score to help you understand and improve your rest quality night after night.
Garmin Forerunner 965
The Garmin Forerunner 965 is a high-performance watch built for runners and triathletes who demand detailed data. It features a large, sunlight-readable display that presents your metrics clearly, even during intense activity. Advanced training tools and performance analytics help you fine-tune your workouts and monitor your progress over time.
With comprehensive health monitoring, including wrist-based heart rate, Pulse Ox, and sleep tracking, it provides a full picture of your well-being. Its robust battery life ensures it can handle long training sessions and races, making it a reliable partner for endurance athletes.
What to Look For in a Smartwatch with an Oxygen Sensor
So, you’re in the market for one of the best smartwatches with an oxygen sensor in 2025. It’s a smart move, as this feature has evolved from a niche health metric to a core part of understanding your overall wellness. But with so many options, how do you pick the right one for you? I’ve spent a lot of time testing these devices, and I can tell you it’s about more than just the sensor’s presence. You need to think about how you’ll actually use the data.
First, let’s talk about the sensor itself. Not all SpO2 (blood oxygen saturation) monitoring is created equal. Some watches only take spot-check measurements, usually when you’re sitting still. This is great for getting a quick reading, like checking how you’re acclimating to a high altitude. Others offer continuous monitoring throughout the day and night. This is where you get really valuable insights, like seeing if your blood oxygen levels dip significantly while you sleep, which can be a sign of sleep apnea. Think about which type of data is more relevant to your health goals.
Next up is battery life. This is a huge one. A watch with all-day SpO2 tracking is fantastic, but not if it needs a recharge every 12 hours. Some of the more advanced watches manage to balance powerful features with multi-day battery life, often by using more efficient processors or simpler display technology. If you’re a frequent traveler or just don’t want another device to charge daily, prioritize battery longevity. It’s no fun having a dead watch on your wrist halfway through your day.
You should also consider the overall ecosystem and the companion app. The sensor collects raw data, but the app is what translates it into something you can understand and act on. A good app will present your SpO2 trends in clear graphs, explain what the numbers mean in plain language, and might even flag potential issues for you to discuss with a doctor. Finally, don’t forget the basics: comfort, display readability in sunlight, and the other health and fitness features you care about, like GPS or heart rate tracking. The best smartwatch is the one that fits seamlessly into your life and gives you peace of mind.
FAQ
How accurate are the oxygen sensors on these smartwatches?
This is probably the most common question I get. Generally, the SpO2 sensors on modern smartwatches from reputable brands are quite good for general wellness tracking. They can reliably show trends, like whether your levels are consistently lower during sleep or drop during a high-intensity workout. However, it’s important to remember they are not medical devices. They aren’t as accurate as a hospital-grade pulse oximeter clipped to your finger. You shouldn’t use the data for self-diagnosis. Think of it as a helpful guide for your overall health, not a definitive medical tool.
Why would I need to track my blood oxygen?
Tracking your blood oxygen can give you a deeper look into your body’s recovery and overall condition. For athletes, a sudden drop in SpO2 during a workout might indicate you’re pushing too hard. For everyone else, nighttime monitoring can reveal issues like sleep apnea, where your breathing repeatedly stops and starts, causing oxygen levels to fall. It’s also useful when traveling to high-altitude locations to see how well your body is acclimating. It’s one more piece of the puzzle in understanding your health.
Can these watches detect serious health issues like sleep apnea?
This is a tricky one. A smartwatch can detect patterns that are suggestive of sleep apnea, such as significant, repeated dips in your blood oxygen levels throughout the night. Many apps will even give you a notification if they detect a pattern of irregular breathing. This can be an incredibly valuable early warning sign. However, it cannot diagnose sleep apnea. A formal diagnosis requires a sleep study conducted by a medical professional. If your watch alerts you to potential issues, you should take that data to your doctor for a proper evaluation.
Do I need a specific type of smartwatch for accurate sleep oxygen tracking?
For the most reliable sleep tracking, you’ll want a watch that offers continuous SpO2 monitoring during the night, not just on-demand spot checks. Many of the top-tier models in our list of the best smartwatches with an oxygen sensor in 2025 have this feature built-in. The watch should also be comfortable to wear while you sleep, so size and band material matter. The data is collected passively, so you just wear it to bed and check the results in the morning.
How does the battery life hold up with constant oxygen monitoring enabled?
Enabling continuous SpO2 monitoring will absolutely have an impact on your battery life. It’s a power-intensive process. Some watches are optimized to handle this better than others. You might find a watch that normally lasts a week will only last 2-3 days with all-night tracking turned on. It’s a trade-off. If long battery life is your top priority, look for models specifically advertised for their endurance, and be prepared to maybe use continuous monitoring only when you feel you need it, rather than every single night.