5 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, the oxygen sensor on a watch is not super accurate and can’t be compared with an FDA approved pulse oximeter but they can surely provide you an overview of your oxygen consumption.

So here we provide you a list of the 5 best smartwatches with oxygen sensors that are up for grab on Amazon. So here we go!

Quick links to the specific parts of the article:

Best Smartwatch With Oxygen Sensors Comparison Table





Best Overall

Apple watch 6

Apple Watch 6

  • Accurate SpO2 reading

  • Standalone smartwatch

  • Superfast processors

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

The 5 Best Smartwatches With Oxygen Sensors

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 your 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 oxygen 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 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 device from Apple is what you should go for.

The Good
  • The oxygen levels are quite accurate

  • Takes a screenshot of your readings for later viewing

  • Great for heart monitoring

  • Super fast processor

  • 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 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 oxygen 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.

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. These smartwatches come with all the basic health tracking features like heart rate monitoring, sleep tracking, steps, and calorie counter, etc.

However, on Vivoactive 4, you also get a pules 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 a good activity tracking smartwatch with all the necessary fitness tracking sensors. 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 smartwatch that can work well with Android devices then the Samsung Watch 3 is the right option for you. It also has a Spo2 monitor that lets you see your blood 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 a good everyday practical smartwatch that also lets you keep an eye on your SpO2 readings then the Samsung watch 3 is 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. Yammy 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 waterproof IP68 ratings 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, for a budget product, this watch provides super value. And if you are a first-time buyer then you could definitely prefer this 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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What Is An Oxygen Sensor?

An oxygen 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 Do Oxygen Senor 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 Reading

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.

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