7 Best Smartwatches With Oxygen Sensor To Accurately Monitor Your Blood Oxygen Levels

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Oxygen is the most important element on earth, without it, life could not have happened here. It is also the most abundant element in the human body so it’s your duty to keep track of your oxygen consumption in order to live a healthy life.

Monitoring your daily oxygen intake allows you to know a lot about your health and wellbeing. But visiting a doctor regularly for a pulse oximetry test to check your oxygen levels is not feasible either.

How about if you could track your oxygen saturation levels every day without going out of your house and using any fancy medical equipment. It may sound a bit exaggerated but it’s true. These days smartwatches come with an oxygen sensor or pulse oximeter as some call it, which can help you know the amount of oxygen flowing in your blood.

However, a smartwatch that measures blood oxygen is not super accurate and can’t be compared with an FDA-approved pulse oximeter but it can surely provide you an overview of your oxygen saturation levels.

So here we provide you a list of the best fitness trackers and smartwatches with oxygen sensors that are up for grabs on Amazon. So here we go!

Quick links to the specific parts of the article:

Best Smartwatch With Blood Oxygen Sensor Comparison Table





Best Overall

Apple watch 6

Apple Watch 6

  • Accurate SpO2 reading

  • Standalone smartwatch

  • Fast performance

For Sleep Tracking

Fitbit Sense

Fitbit Sense

  • Accurate sleep tracking

  • Advanced health monitoring

  • Voice Assistant

Best Fitness Tracking

Garmin Vivoactive 4 with oxygen sensor

Garmin Vivoactive 4

  • SpO2 and VO2 max readings

  • Accurate health tracking

  • Female health tracking

Best Fitness Band With Oxygen Monitor

fitness tracker with oximeter

Garmin Vivosmart 4

  • Health and fitness tracking

  • Instant SpO2 readings

  • VO2 max estimations

Best SpO2 Smartwatches Video

Best Smartwatches With Oxygen Sensor

1. Apple Watch Series 6

Apple watch 6

With Apple Watch Series 6, Apple has finally provided an oxygen sensor on its watch. Before Apple Series 6 this feature was not available on any of its watches. So it’s a great move from Apple to satisfy users who want to measure their blood saturation levels.

However, it should not be used for medical purposes because it’s not 100% accurate. But it’s not that offbeat too. It’s good for occasional checkups and you won’t find much difference in reading shown by oximeter in Apple Watch and the medically certified oximeters.

However, the readings it shows are not continuous like you would see on pulse oximeters. If you want to measure your blood oxygen level continuously because you have respiratory issues then we can’t recommend this watch.

It takes a screenshot of the reading for later viewing and analyzing your oxygen levels which is a good thing for keeping track of your SpO2 levels.

Along with an oxygen sensor, it also has a heart rate and ECG monitoring, which makes it a great fitness tracking device. Besides fitness and health tracking what makes this watch a great investment is that it has a fast processor that makes everything on this watch work faster. Moreover, it features a great always-on display and comes in a sturdy metal build. It is also available in a cellular version which is great if you want to use it as a standalone smartwatch.

Overall, if you are looking for the best smartwatch with an oxygen sensor then this pulse oximeter Apple Watch is a great deal for you.

The Good
  • The oxygen levels are quite accurate

  • Takes a screenshot of your readings for later viewing

  • Great for heart monitoring

  • Fast performance with no lags

  • Also available in the cellular model

The Bad
  • Does not show continuous reading

  • Does not work with Android phones

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2. Fitbit Sense

Fitbit Sense

If you have sleep apnea or asthma then we have this cool Fitbit oxygen monitor watch for you. It can help you monitor your blood oxygen saturation levels while you sleep. It shows you the reading that it gathered in the night on the next day and helps you analyze the SpO2 percentage in your blood.

You will need to download a watch face to see your readings on the watch screen. Or you can see the detailed insights on your connected smartphone.

The readings it shows are also quite reliable, well not as accurate as a professional oximeter. But yes it does give satisfactory results, which is enough to be aware of your oxygen consumption during sleep.

Also, Fitbit is known for its fitness tracking abilities so you rest assured that you will get good accuracy with a Fitbit watch. Moreover, Fitbit Sense is the latest smartwatch from the Fitbit brand that is dedicated mostly to fitness tracking, so it is definitely worth a try.

It hosts a lot of other health-tracking features that make this smartwatch a must for people who are concerned about their health and fitness. However, the only downside that we see is that it can only monitor oxygen saturations at night time when you sleep. This may be a deal-breaker for many but many would still love to use this watch especially for people who face breathing issues when they sleep. Overall, it’s the best fitness watch with an oximeter you can buy as of now.

The Good
  • Pros

  • Shows reliable oxygen levels

  • ECG App

  • Built-in voice assistant

  • Contactless Payments

  • GPS chip for tracking locations

The Bad
  • Only reads when you are sleeping

  • No cellular connectivity

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3. Garmin Vivoactive 4

Garmin Vivoactive 4 smartwatch with oxygen sensor

Vivoactive series of smartwatches from Garmin is dedicated to its users who prefer to track their daily activities. This Garmin smartwatch has heart rate monitoring and all other basic health tracking features like sleep tracking, steps, and calorie counter, etc.

However, on Vivoactive 4, you also get a pulse OX sensor that will help you detect the oxygen saturation in your blood. You can either set it to track your oxygen all time or you can set it to track your oxygen levels when you sleep. This is helpful to track your oxygen consumption during sleep and if you have sleep apnea then it’s even more important to track your oxygen levels at night.

To set the timing of the pulse OX sensor you need to go to the Garmin Connect app on the connected mobile device and change the settings from there.

It also shows you an estimated reading of VO2 max which is crucial if you train for sports like running, cycling, or swimming. By knowing the VO2 max readings you can know how hard you are training and your thresholds to prevent injuries.

Overall it is the best watch with a pulse oximeter that has all the necessary fitness tracking sensors for tracking your daily sports and other activities. It can even track menstrual cycles so it’s a great smartwatch for women too.

The Good
  • Let you detect your blood oxygen levels

  • Sleep tracking using the pulse oximeter

  • Menstrual cycle tracking

  • Built-in GPS for tracking activities

  • Accurate heart monitoring

The Bad
  • Battery consumption is high

  • Sleep tracking is not the most accurate

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4. Samsung Galaxy Watch 3

Samsung galaxy watch 3

If you are looking for a premium Samsung smartwatch with an oximeter that can work well with Android devices then the Samsung Watch 3 is the right option for you. It has a SpO2 monitor that lets you see your blood oxygen consumption levels.

To use this feature on your Samsung watch 3 you must upgrade it to the latest software. If you already own a Samsung watch 3 and cannot use this feature it may be because you have not upgraded to the latest firmware.

To use this function on your Samsung Watch 3, you should go to Samsung Health settings on your watch. If you have updated your watch you will find the SpO2 reading feature there.

You can also set this feature as a widget on your watch if you are going to use it regularly. This will save you some time and make oxygen level tracking a straightforward task.

The reading it shows depends on various factors like exercise, breathing problems, and elevations. For more accurate reading Samsung asks you to wait for at least 5 minutes after a workout.

Overall, if you are looking for the best smartwatch for SpO2 reading then the Samsung Watch 3  can be the right contender for it.

The Good
  • Accurate blood oxygen tracking

  • Military-grade durability

  • ECG app

  • Accurate heart rate monitoring

The Bad
  • Expensive watch

  • No blood pressure monitoring

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5. Yamay Smartwatch

YAMAY Smart Watch

Last but not least, on our list, we have the cheapest smartwatch with a blood oxygen sensor. It is the only good smartwatch under 100 dollars that features a practical pulse oximeter. If your budget doesn’t allow you to go for an expensive smartwatch you can pick this watch instead.

At this price point, you can’t expect super-accurate readings from it but it still provides you more than it could offer at this budget. The oximeter reading is reliable for causal checking but should not be compared with a professional pulse oximeter.

Other than the oxygen sensor the watch also has some other health tracking features like heart monitoring, sleep tracking and it can even monitor your blood pressure. So you are getting way more than you are paying for.

The build quality is also quite decent on this device, you get a waterproof IP68 rating so don’t worry it won’t go bad that easily.

It’s also good for tracking female health so if you are a woman this could definitely be your next watch. Overall, it’s the best budget smartwatch with a SpO2 sensor. And if you are a first-time buyer then you could definitely prefer this pulse oximeter watch over others.

The Good
  • Affordable smartwatch

  • Lets you track your blood oxygen levels

  • Allows female health tracking

  • Supports blood pressure monitoring

  • Waterproof smartwatch

The Bad
  • Battery life is not great

  • Not very accurate

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If you don’t want to go with the best Spo2 watches that we have shared above then we have the best fitness bands with oxygen sensors for you. In case you don’t like wearing bulky smartwatches and want to go with something slim and lightweight.

Best Fitness Trackers With Oxygen Monitor

6. Garmin vivosmart 4

fitness tracker with oximeter

Garmin vivosmart 4 is a sleek and lightweight fitness tracker band that you can wear all day long without feeling it even there. Besides that, it also looks stylish so it even adds elegance to your look. It’s a fitness tracker and therefore comes with all basic fitness and activity tracking features such as heart rate monitoring, sleep tracking, calorie and step counter, etc.

However, the reason why it’s here on this list is that it comes with an O2 sensor that calculates the amount of oxygen flowing through your blood and gives an estimated SpO2 percentage. With this SpO2 fitness tracker, you can check your blood oxygen saturation level at any time of the day. It also tracks your oxygen level automatically while you are sleeping and provides you detailed data the next morning.

Besides oxygen saturation levels, it also estimates your VO2 max and tells you how much oxygen your body is consuming during workouts. And like a smartwatch you also get phone notifications on your fitness band which keeps you connected with the world.

So it a complete package and a great alternative to a smartwatch for people who don’t like wearing a watch all day long. Overall, if you want to go with the best fitness tracker with an oximeter then you should not look any further than this.

The Good
  • Comfortable to wear
  • looks sleek and stylish
  • Lets you check SpO2 readings anytime you want
  • Shows your VO2 max estimates
  • Monitors your heart rate and sleep
The Bad
  • The accuracy is not 100%
  • A little expensive for a fitness band

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7. Honor Band 5

spo2 fitness tracker

Honor Band 5 is an affordable alternative to the Garmin vivosmart 4 as it offers the same features at less than half of its price. With Honor band 5 you can keep track of your health and fitness without spending hundreds of dollars on expensive smartwatches and fitness trackers.

It can detect your heartbeats and also monitors your sleep and provide tips on how you can sleep well. The sleep monitoring data it provides is quite accurate and you can expect an accuracy rate of up to 95%  which is great for such an affordable fitness tracker. What’s even better is that you get a SpO2 monitor on this fitness tracker which measures your blood oxygen levels.

The SpO2 readings it provides are within ± 1 to 2% accuracy which can be considered good looking at its price. It’s good for casually checking your blood saturation levels but you should not use it for medical diagnoses. Overall, for under $50 you cannot get any better SpO2 fitness tracker than the Honor Band 5.

The Good
  • It’s slim and lightweight
  • Budget-friendly
  • Shows SpO2 readings with decent accuracy
  • Effective sleep and heart monitoring
  • Cheap but durable
The Bad
  • App sync issue
  • Readings are not regular

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What Is An SpO2 Sensor?

An oxygen or SpO2 sensor is an electronic device that measures the amount of oxygen present in gas or liquids. In this case, the oxygen sensor on your watch determines the amount of oxygen flowing through your blood vessels and helps you determine your oxygen consumption.

How Does Oxygen Sensor On Watch Works?

The oxygen sensor is built on the backside of the watch. It uses an array of LEDs containing red, green, and infrared lights. The light emitted by these LEDs passes through your skin onto the blood vessels carrying oxygenated and deoxygenated blood. Some of the light is absorbed by the blood while some light is reflected back to the watch.

The reflected light is then caught by the 4 photodiodes on the watch, which converts the light into an electrical signal and shows you the amount of oxygen in your blood in the SpO2 percentage.

Factors That May Affect The SpO2 Readings

There are many factors that may affect the readings of your blood oxygen levels. For example, if you have tattoos on your wrist then the ink of the tattoo can make it harder for the light to penetrate through your skin and reach the blood vessels.

The temperature can also affect the reading as in winters the blood vessels get a bit narrow, which slows down the blood flow. So the readings may vary from place to place and person to person.

For most accurate readings you must stay still, if you are moving or even talking then the sensor may show you false readings. Also, if the watch is not perfectly fit on your wrist then the readings will not be very accurate.


Can A Pulse Oximeter Detect Heart Attack?

Yes, a pulse oximeter can detect heart attack and any other medical condition that affects the oxygen levels in the blood of a person.

What should be the pulse rate in the Oximeter?

A pulse rate of anything above 95% is considered a good pulse rate.

Are Pulse Oximeters On Smartwatch Accurate?

They are not always 100% accurate. If you want accurate readings you should buy a medically certified oximeter.

Can Smartwatch Replace Oximeter?

Smartwatches do provide accurate readings and are best for keeping track of your blood oxygen levels. But when it comes to medical diagnosis they cannot replace a medical grade oximiter.

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