Best Smartwatch With Oxygen Sensor

Blood oxygen monitoring via a smartwatch offers a great way to monitor your respiratory health by observing your blood oxygen levels throughout the day. A blood oxygen sensor can adequately measure blood oxygen saturation levels, blood pressure, sleep tracking, including sleep apnea measurements as it pertains to blood oxygen, and much more.

Health tracking features are some of the most important features for smartwatches especially those with blood oxygen saturation readings. Whether it is a blood oxygen sensor or a pulse oximeter, any feature pertaining to heart monitoring is useful for watching your health.

In this guide, we are going to take a comprehensive look at some of the best smartwatches with blood oxygen sensor mechanisms. If you can’t wait to find out which devices made it to the top of the list, then take a sneak peak below:

  1. Garmin Forerunner 245
  2. Garmin Venu 2
  3. Fitbit Versa 3
  4. Samsung Galaxy Watch 4
  5. Apple Watch Series 7

We will also answer some frequently asked questions about blood oxygen saturation and how sensors are convenient tools for accurate readings.

Quick Overview: Best Smartwatch With Oxygen Sensor
Garmin Forerunner 245
  • Evaluates your current training status
  • Safety and tracking features
  • Allows you to control the music playback from your phone
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Garmin Venu 2
  • Energy monitoring
  • Mindful breathing
  • Sleep score
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FitBit Versa 3
  • High and low heart rate alerts
  • Stress tracking
  • Daily readiness
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Samsung Galaxy Watch4
  • Total wellness management
  • Sleek and lightweight
  • Blood pressure and ECG
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Apple Watch Series 7
  • Fitness Tracking
  • Full screen
  • Emergency SOS
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Read on to find out more.

Which smartwatch has an oxygen sensor to measure blood oxygen levels?

Nearly all the popular brands have smartwatches with blood oxygen saturation readings. Garmin, Fitbit, Apple, and many others can read and display your blood pressure, blood oxygen level, and even measurements of your overall sleep quality with blood oxygen level readings.

Best smartwatches with a blood oxygen sensor

Not all fitness trackers automatically have features for measuring blood oxygen levels, and therefore, in the next section, we will offer full reviews of 5 of the very best to consider.

Garmin Forerunner 245

With this superb smartwatch, you do the running and the Forerunner 245 does the thinking. This GPS smartwatch doesn’t just tell you where you ran.

It tracks your stats, crunches the numbers, and gets to know all about your performance, your running form, your training history, and even your goals. All you need to focus on is putting one foot in front of the other.

This watch evaluates your current training status to indicate if you’re under-training or overdoing it with its numerous performance monitoring features.

The Forerunner 245 provides advanced running dynamics, including ground contact time balance, stride length, vertical ratio, and more.

Safety and tracking features include incident detection (during select activities) which sends your real-time location to emergency contacts through your paired compatible smartphone.

In terms of blood oxygen sensors, the Forerunner 245 offers personalized training and recovery insight for smarter training decisions, helping you prepare for your next race.

It does this by keeping tabs on your VO2 max and understanding how heat and altitude impact your performance.

The higher your VO2 max, the higher you can expect to perform, which is exactly what is shown by the performance condition metric. 

Additional features include a training status that evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking, or overreaching.

You can see how your workouts influence the development of endurance, speed, and power with aerobic and anaerobic training effect feedback. 

Recovery time helps you maximize the benefit of your efforts by predicting when you will be ready for your next tough challenge. You can also view your overall training load, which measures your exercise volume.


  • GPS running smartwatch with advanced training features
  • Evaluates your current training status to indicate if you’re under-training or overdoing it; plus it offers additional performance monitoring features
  • Get free adaptive training plans from Garmin Coach, or create your own custom workouts on the Garmin Connect online fitness community
  • Provides advanced running dynamics, including ground contact time balance, stride length, vertical ratio, and more 
  • Safety and tracking features include incident detection (during select activities) which sends your real-time location to emergency contacts through your paired compatible smartphone


  • Blood oxygen sensors can be finicky during intense physical activity

Garmin Venu 2

We all know that when you live healthily, you live better, and one of the best ways to get in tune with your mind and body is with the Garmin Venu 2. In fact my daughter has this exact watch which she wears night and day, so I can not recommend it enough.

This GPS smartwatch has advanced health monitoring and fitness features to help you better understand what’s going on inside your body. 

At times, it feels good to move, and with this watch, you can switch up your activities with animated workouts and more than 25 built-in indoor and GPS sports apps.

The Venu 2 allows you to unwind with your favorite music, stored right on your wrist for phone-free listening when paired with wireless headphones, and the battery life of up to 5 days with rapid recharging lets you get an uninterrupted picture of your health. 

You can get to know your body better with extensive health monitoring features including health snapshot, Body Battery energy levels, sleep score, fitness age, stress tracking, and more.

In terms of blood oxygen sensing, the Garmin Venu 2 is one of the better models in the Garmin line for this feature.

The sensory input is perfectly attuned to your circulatory and respiratory systems with an easy-to-read display. 


  • Use preloaded workouts that include cardio, yoga, strength, HIIT, and Pilates, or create your own in the Garmin Connect app on your compatible smartphone
  • Try Garmin Coach free adaptive training plans to help you prepare for your next running challenge
  • Download up to 650 songs to your watch, including playlists from Spotify, Amazon Music, or Deezer (may require a premium subscription), and connect with wireless headphones (not included) for phone-free listening
  • With a supported country and payment network, you can leave your cash and cards at home; Garmin Pay contactless payments let you pay for purchases on the go
  • Never miss a call, text, or social media alert with smart notifications delivered right to your wrist — when paired with a compatible Android or Apple smartphone


  • Although the blood oxygen sensors are superb, the watch does not include as many advanced features as other Garmin models

Fitbit Versa 3

With the Fitbit Versa 3, this smartwatch has everything you need to just go, go, and go some more.

A great thing about this watch is that you can track your pace and distance and leave your phone at home with a built-in GPS.

You can also get call, text, and app notifications, use Google Assistant or Amazon Alexa Built-in, control Spotify, Deezer and Pandora and use the built-in mic and speaker to take Bluetooth calls hands-free when your phone is nearby. 

Plus with Active Zone Minutes, 20+ exercise modes, and a 6+ day battery with 12-minute fast charging, you’ve got all the motivation you need to reach your health and fitness goals.

One feature of this watch I really like, is that you can run, bike, hike, and more phone-free and see your real-time pace and distance with built-in GPS. Then you can check out your workout intensity map in the Fitbit app.

In terms of blood oxidation, Active Zone Minutes uses your resting heart rate to gauge exercise effort and gives you a buzz when you step up the intensity so you can make the most of your workouts with a maximum operating altitude of up to 28,000 ft.

This allows you to better track your heart rate 24×7 with Pure Pulse 2.0, which is Fitbit’s enhanced heart rate technology good up to an operating temperature of -4° to 140° F. You can also see your nightly blood oxygen levels at a glance with our collection of SpO2 clock faces.

The Fitbit app allows you to track your trends over time in the Health Metrics dashboard and shows you indications of important changes in your wellness.


  • Use Google Assistant or Amazon Alexa Built-in to get quick news, set bedtime reminders and alarms, control your smart home devices, and more just by speaking to your watch
  • Use the built-in mic and speaker to take Bluetooth calls hands-free, send callers to voicemail, and adjust the volume 
  • Store and play music and podcasts on Deezer or Pandora, plus control Spotify all from your wrist


  • Active Zone minutes feature may have problems syncing accurately

Samsung Galaxy Watch 4

I am currently using the Samsung Galaxy Watch 4, and in terms of heart rate monitoring, this watch ranks highly for all features.

With this watch, you can make the most of every run with advanced coaching and oxygen level monitoring that help you exercise smarter while increasing endurance whilst the SpO2 measurement software accurately and comprehensively measures heart rate with clear and easy-to-understand readings.

You can even leave your phone behind and still stay connected by call, text, and stream music, all from your wrist with LTE connectivity. 

The snoring measurement is also beneficial but does requires a smartphone with Android 6.0 or later,  or a 1.5GB of RAM smartphone within 2 feet of the user, with snore detection enabled through Samsung Health app version 6.18 or higher.  

For clinical trial results concerning the accuracy of the ECG monitor, the results were promising and can easily be seen once you use the feature accurately. The ECG monitor app is not intended to replace traditional methods of diagnosis or treatment and is for information purposes only.

Nor is the ECG monitor app intended for users with known arrhythmias other than atrial fibrillation or users under 22 years old. 

Users should not interpret or take clinical action based on the device without the consultation of a qualified healthcare professional.

An accurate VO2 max reading requires running outdoors for at least 20 minutes with GPS on and be sure to consult the user manual before use to make sure you get this right. 

The Galaxy Watch 4 is compatible with select Bluetooth-capable smartphones running Android 6.0 or higher and RAM above 1.5GB.

Galaxy Watch 4 Series supported features may also vary by carrier and compatible device. For best results, we recommend that you connect with a compatible Samsung Galaxy smartphone.


  • LTE Connectivity allows you to call, text, and stream without your phone
  • Get ready to crush your wellness goals with body readings right on your wrist
  • Be smart about your heart with accurate ECG monitoring and keep an eye on possible atrial fibrillation, a common form of irregular heart rhythm
  • You can share personalized readings with your doctor using the Samsung Health Monitor app on your compatible Galaxy phone
  • Make every workout count with advanced fitness tracking that recognizes 6 popular activities, from running to rowing to swimming, automatically in just 3 minutes


  • Although a perfect watch for blood oxygen sensing, the Galaxy Watch 4 is rather lacking in performance tracking features

Apple Watch Series 7

Last but certainly not least, the Apple Watch Series 7 allows you to measure your blood oxygen level with a revolutionary sensor and app with even more stunning accuracy than the Apple Watch Series 6.

As we have discussed, your blood oxygen level is a key indicator of your overall wellness. It can help you understand how well your body is absorbing oxygen and the amount of oxygen delivered to your body. 

The remarkable sensor and app in Apple Watch Series 7 allow you to take on‑demand readings of your blood oxygen as well as background readings, day and night. You can also take an ECG anytime, anywhere to check your heart rate, along with other innovations like mindfulness and sleep tracking to keep you healthy from head to toe.

Series 7 puts more health insights within reach and is a superb upgrade to what was available with the Apple Watch Series 6.


  • Always-on Retina display has nearly 20% more screen area than Apple Watch Series 6, making everything easier to see and use
  • The most crack-resistant front crystal yet on an Apple Watch, IP6X dust resistance, and swim-proof design
  • Measures your blood oxygen with a powerful sensor and app
  • Takes an ECG anytime, anywhere
  • Allows you to get high and low heart rate and irregular heart rhythm notifications
  • Gets you to stay in the moment with the new Mindfulness app, and reach your sleep goals with the Sleep app
  • Track new tai chi and Pilates workouts, in addition to favorites like running, yoga, swimming, and dance
  • Track your daily activity with this watch, and see your trends in the Fitness app on iPhone
  • Sync your favorite music, podcasts, and audiobooks
  • Pay instantly and securely from your wrist with Apple Pay


  • Some customers are supporting wrist irritation with the Series 7 that wasn’t commonly reported with the Apple Watch Series 6

Frequently Asked Questions

Can my smartwatch take my oxygen level?

Yes. Depending on your smartwatch, the blood oxygen sensor will adequately measure your blood oxygen level with a reading appearing as a percentage. A smartwatch can also measure other features such as blood pressure, sleep tracking, and ECG readings as well.

Not all brands will present this reading the same way. Some brands may refer to this feature as a pulse oximeter, pulse ox sensor, or just an “oxygen sensor.”

The pulse oximeter typically will not be an oxygen sensor, but the oxygen sensor may be an additional feature under the pulse oximeter category on the watch.

What is a Pulse Oximetry?

A pulse oximeter is a device or an app feature that is used to quickly and easily monitor a person’s oxygen saturation and oxygen levels.

This means it can measure the level of oxygen within the blood, especially arterial blood without using any invasive means.

It also measures the oxygen saturation of pulsating blood, which is commonly known as SPO2. A person’s heart rate is automatically calculated alongside the percentage of oxygen.

The pulse oximeter uses light to work out the oxygen saturation. Light is emitted from the light source, which goes across the pulse oximeter probe and reaches the light detector.

The light passes through the skin to reach the detection needed to accurately rate the oxygen levels in the blood. This reading is then conveyed on the pulse oximeter in the form of a percentage.

Which smartwatch has the most accurate SpO2 to measure blood oxygen level?

In terms of the best SPO2 readings, the Samsung Galaxy Watch 4 is for all intents and purposes the best smartwatch in this area.

The Samsung Galaxy Watch 4 has SpO2 measurement software that accurately and comprehensively measures heart rate with clear and easy-to-understand readings. Additionally, you can also take an ECG anytime, anywhere to check your heart rate.

Which smartwatch has ECG and SpO2?

Again, the Samsung Galaxy 4 has both ECG and SPO2 readings built into the mainframe of the watches overall fitness tracking features. This watch allows you to take care of your heart with accurate ECG monitoring and keep an eye on possible atrial fibrillation, which is a common form of irregular heart rhythm.

For more accurate and comprehensive results, you can also share your personalized readings with your doctor using the Samsung Health Monitor app on your compatible Galaxy phone.

By combining both SPO2 and the ECG readings, the Samsung Galaxy 4 is unique amongst all the various smartwatches that can accurately track oxygen saturation and heart monitor readings.


There are so many benefits to your health in monitoring your oxygen levels which is why we recommend investing in a smartwatch that has an oxygen sensor or pulse oximeter. We hope you’ll agree that these 5 smartwatches truly are the best of the best.

Best GPS Tech

At Best GPS Tech we found it frustrating that there were limited websites available, willing to provide an honest opinion on the latest GPS technology to aid our interests. We enjoy creating content around GPS products from the industry leaders such as Garmin, FitBit and more. We hope you find the site informative in helping you make the right buying decisions.

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