12 Best Smartwatches with Blood Oxygen Sensors (2022)

Blood oxygen saturation monitoring is one of the vital features of overall wellness. Especially for athletes and fitness lovers, this is a must-have feature.

Although smartwatches have optical heart rate sensors, calorie tracking, sleep talking, etc., we have seen that most smartwatches lack a blood oxygen sensor. And it’s also difficult to find a smartwatch with an accurate SpO2 sensor.

To help you out, we have done deep research, tested a few smartwatches, and found out some of the most accurate and best smartwatches with blood oxygen sensors. 

Note: We have also added some brand new flagship watches to our list you will get a fresh item. This list is up to date, so let’s have a look.

In A Hurry! Here Are Our Top Picks…

Related Post: 

Top 12 Best Smartwatches with Blood Oxygen Sensor

1- Apple Watch 7

 Apple Watch 7


OSWatch OS
CompatibilityOnly iOS
DisplayLTPO OLED, Touchscreen, Digital Crown
Internal Storage32 GB
IP Rating50m
Battery Life18 hours

Apple Watch 7 is the new addition to the Apple Watch series, packed with advanced SpO2 and VO2 max sensors. This smartwatch mainly focuses on health features, and the accuracy is much improved compared to Apple Watch 6.

The blood oxygen sensor in Apple Watch 7 uses high-end technology to give quick and accurate results. This feature is crucial for an athlete as it tells you how well your body is absorbing oxygen. 

Further, you can check your iPhone app’s blood oxygen saturation data. The app shows you the data of the previous month, week, and days; this gives you an estimate of your fitness routine. 

How To Take A Blood Oxygen Readings

On Apple Watch 7, it’s pretty easy to take blood oxygen measurements. Before monitoring SpO2, make sure your watch is sung. 

  • Open blood oxygen app your smartwatch
  • Now start monitoring; keep your wrist still and flat to get accurate results.
  • Keep your arm steady for 15 seconds, and after 15 seconds, you will get the results.

Previously Watch 6 measured your blood oxygen level in 30 seconds. Now Watch 7 gives you results in just 15 seconds because of its revolutionary sensors. And I think this is the world’s first smartwatch that measures SpO2 in just 15 seconds.

Moreover, Watch 7 also measures your blood oxygen at night, which is another plus point.


Other Features

Under the hood, there are many things to explore in the Apple Watch 7. This health focus device allows you to take ECG, measure stress, advance sleep monitoring, calorie tracking, and much more. 

Apple has now added more sports modes to Watch 7. And the watch automatically tracks your outdoor sports. During sports, it effectively measures your health metrics and gives deep insights. The built-in GPS allows you to measure distance, speed, pace, etc. You don’t need a smartphone to measure routes. 

Another improvement that we have seen is a large and vibrant display. The big screen allows you to type messages on the QWERTY keyboard quickly. You can also answer calls directly from your wrist.

When it comes to battery life, we haven’t seen any improvement, and battery life is similar to Apple Watch 6. You will get the same 18 hours of battery, but it has fast charging support that saves a lot of time.

Overall, Apple Watch 7 is the best smartwatch with a blood oxygen sensor that gives more stable and accurate results. It also has various premium features for fitness lovers. So if you want some premium quality and precise smartwatch, the Apple Watch 7 is the best option for you.

  • Larger display
  • More vibrant display
  • QWERTY keyboard
  • Excellent accuracy
  • Fast charging
  • Battery life could be improve
  • Adds only two new watch faces

2. New Apple Watch Series 6

smartwatch with blood oxygen sensor


OSWatch OS
CompatibilityiOS 12.0+
Display1.78 inch, LTPO OLED, Touchscreen, Digital Crown
Internal Storage32 GB
IP Rating50m
Battery Life18 hours

In every model, Apple comes up with new and unique concepts and services. Apple has finally included an oxygen sensor in the Apple Watch Series 6.

Apple Watch 6 uses efficient algorithms to analyze blood oxygen saturation quickly. It takes approximately 30 seconds to show readings. During the SpO2 test, you have to keep your wrist still and flat to get more precise readings. 

The good thing is that Apple Watch 6 also measures SpO2 during outdoor sports like running, cycling, jogging, or other sports. Plus, Watch 6 also measure SpO2 at night so you can estimate how well your health was at night. 

According to Apple, their blood oxygen sensor comprises four LED photodiodes sensors. All the sensors work in parallel to get more accurate results.

It also saves a screenshot of the data to review and analyze your oxygen levels later, which helps record your SpO2 levels.

However, because it is not 100 per cent accurate, people may not utilize it for therapeutic purposes. However, it is helpful for routine checkups.

Other Features

smartwatch with blood oxygen sensor

Apart from SpO2, the watch also offers other existing health features. The watch can check your ECG, and you can also share the ECG report with your doctor for a better consultant. 

The advanced sleep tracking app keeps track of your sleep trends, variation, and bedtime so that you can improve your sleep quality. Moreover, you will get an accurate calories tracker, stress management, breathing exercises, and other advanced sports modes.

For elderly or heart patients, there is a fall detection feature that detects the sudden fall or shift. The watch also asks the user to make an emergency call if needed. .

It also has a beautiful always-on display and robust metal construction. You can use this wristwatch to send text messages, make calls, and listen to Apple music.

Unfortunately, the Apple Watch’s main flaw is that it can only work with an iPhone. Due to this, Android users will be unable to utilize this luxury smartwatch.

Overall, if you’re looking for the best smartwatch with an oxygen sensor, the Apple Watch with a pulse oximeter is a fantastic choice.

  • Always-on display
  • Sleek design
  • FDA Approved ECG
  • Water resistance up to 50 meters
  • Built-in GPS
  • Expensive
  • Poor battery life
  • It only works with iPhone

3. Garmin Forerunner 245

watches having blood oxygen sensor


OSGarmin OS
CompatibilityBoth iOS and Android
Display1.2 inches, Transflective (MIP) LCD
Internal StorageN/A
IP Rating50m
Battery Life7 days

When it comes to smartwatches, Garmin is the sole leader. Although the brand is recognized for its sports and fitness tracking capabilities, it also prioritizes health aspects.

If you want to evaluate your running, jogging, or cycling activities, the Garmin Forerunner 245 is the watch for you. It has a SpO2 sensor that measures the oxygen level in your blood, which is very useful when running.

Garmin named its blood oxygen sensor Pulse OX sensor, which tracks your SpO2. This tells you how your body is absorbing oxygen during activities or even during sleep.

The device uses red and infrared lights with sensors in parallel to estimate oxygenated blood in your body. You can see different graphs and trends of your blood oxygen saturation on the app. 

According to Garmin, you should wear the watch above your wrist bone and hold your arm still to get accurate blood oxygen saturation results.

On Forerunner 245, there are many fantastic watch faces available that show different graphs and readings about your blood oxygen saturation. The readings automatically change after a few times. You can also download watch faces from the Garmin Connect store and customize watch faces according to your need.

Other Features

Garmin has a lot of valuable features for athletes and especially for runners. In Forerunner 245, you will see running dynamics that measure the pace, cadence, stride length, ground contact time, and balance. 

I love its intensity minutes feature that allows you to track daily intensity minutes. With this feature, you can track which part of the day you have earned more intensity minutes. The new recovery time feature helps you know how long you should rest before your next workout. 

If you are a bodybuilder or a pro-level athlete, then definitely Forerunner 245 is an option, as this watch accurately tracks high-intensity exercises (HIIT). 

Other valuable features include; training effect, training load, VO2 max, wrist-based heart rate, preloaded sports apps, sleep tracking, body battery energy, and women’s health tracking.

It has a 5 ATM water-resistant rating. As a result, you may swim up to 50 meters underwater with this timepiece.

Because it has a built-in GPS, you can use it for outdoor activities like trekking, long-running, and other sports that demand regular SpO2 monitoring.

Furthermore, the heart rate tracking and SpO2 capabilities assist this smartwatch in precisely measuring sleep patterns.

Also, it offers a 7-day battery backup. Depending on the settings and functions you utilize, the battery life may change.

  • Accurate Blood Oxygen level monitoring
  • Good battery life
  • Durable
  • Water resistance of 5 ATM
  • Built-in GPS
  • No altimeter
  • Misses mobile payment app

4- Garmin Instinct Solar



OSGarmin OS
CompatibilityBoth iOS and Android
Display1.27 inches, Transflective (MIP) LCD
Internal Storage8 MB
IP Rating100m
Battery Life24 days

The Garmin Instinct Solar is one of the finest running watches in Garmin history, which is made to break convention. It features a wrist-based pulse oximeter to measure oxygen saturation in your blood.

By knowing your oxygen saturation, you can determine how your body is adapting to stress and exercise. Additionally, you can view the extra details about your pulse oximeter readings on the Garmin Connect app.

How Does Blood Oxygen Sensor Work In Instinct Solar?

Instinct uniquely measures your blood oxygen level by shining light into your skin and checking how much light is absorbed. This is called the SpO2.

After the blood oxygen level is measured, you can view the additional details about reading like trends over multiple days. Moreover, by turning on the Pulse Oximeter Sleep Tracking, Instinct Solar can also measure the blood oxygen level during sleep.

Other Features

Instinct Solar is a GPS smartwatch built to endure longer. With its Military standard toughness, you can perform outdoor activities without worry.

It comes with a Fiber-reinforced polymer case that is chemically strengthened, and its Corning Gorilla glass prevents it from scratches and dust.

Talking about its health features, most importantly, it has a Wrist-based heart rate, which gives you heart rate and variation alerts during activities.

To calculate your stress level score, heart rate variability is used to see if you have a calm, balanced or stressful day. With the Body Battery Energy Monitoring, you can optimize your body’s energy reserve.

Instinct Solar comes with preloaded activity profiles for running, hiking, biking, swimming, strength, and rowing to keep you active and fit in the fitness department.

The Multi-GNSS support allows you to access the multiple global navigation satellite system (GPS, GLONASS, Galileo). These systems help you to track in more challenging environments.

Using the ABC sensors, now navigate your next trail. And with the trackback routing, you can navigate the same route back to your starting point.

Talking about its intelligent features, it has an innovative notification feature, which keeps you alert with calls, messages, emails, etc.

If we look at the battery of Instinct Solar, Instinct can provide unmatched battery life to those that explore under the sun. Furthermore, it is IP rated 100m.

  • Well designed interface
  • Great range of activities
  • Highly accurate SpO2 sensor
  • Perfect for outdoor activities
  • Amazing battery life
  • Black and white display

5. Fitbit Sense Advanced Smartwatch

smartwatches having oxygen sensor


OSFitbit OS
CompatibilityBoth iOS and Android
Display1.58 inches, AMOLED, touchscreen
Internal Storage4GB
IP Rating50m
Battery Life6days+

In 2022, Fitbit Sense is another best smartwatch with blood oxygen sensor SpO2. It is the most recent addition to the Fitbit family. It is Fitbit’s latest technologically advanced smartwatch to date.

This smartwatch detects your blood oxygen level correctly and keeps you informed about your health. It also tells you about your cardiac health.

Nowadays, stress is one of the major diseases in society, but with Fitbit Sense, you can check stress. The watch offers various exercises to control stress. The built-in Electrodermal Activity EDA app is responsible for stress management. Compared to the Fitbit Versa 2, Fitbit Sense has accurate algorithms that give a more precise reading.

Moreover, it correctly measures your heart rate. The Fitbit ECG app can also be used to track the rhythm of the heart.

When you sleep, it also checks and analyses your skin temperature from your wrist. As a result, the watch is exceptionally dependable and performs admirably in terms of fitness tracking.

It’s also waterproof to a depth of 50 meters. When compared to Apple wearables, its battery life of 6 days is highly excellent.

built-in microphone and speaker are also included with the Fitbit sense. It’s also equipped with GPS. Furthermore, you can use the watch to answer calls and send texts without having to take your phone out of your pocket.

Ultimately, this watch delivers excellent results and is considered the best smartwatch for oxygen measurement.

When it comes to battery life, the Fitbit Sense offers an average battery life, but still better than Apple and Wear OS watches. You will get 6 days of battery timing in smartwatch mode. But the battery depends on the usage of features, and you can increase the battery life by applying optimized settings.


  • ECG App approved by the FDA
  • Premium design
  • Shows accurate oxygen levels
  • Built-in GPS
  • Sleep tracking
  • On-board music storage
  • Pricey

6. Garmin Venu 2


OSProprietary OS
CompatibilityBoth iOS and Android
Display1.3 inches, AMOLED, Touchscreen
Internal Storage4 GB
IP Rating5ATM
Battery Life11 days

If you’re searching for the top smartwatch with an oxygen sensor, the Garmin Venu 2 is a good option.

The built-in Pulse OX sensor checks blood oxygen saturation; even at night, the sensor works and tracks how your body absorbs oxygen. On Venu 2, you will get extra details of SpO2, and the watch shows detailed graphs and trends to understand your wellness quickly. 

Apart from this, another best feature that I have seen is Body Battery Energy Monitoring. This feature allows you to check the overall energy of your body energy so you can find the best time to rest. 

Garmin Venu 2 is a fitness and health-focused smartwatch that’s why it added many valuable features. One of the interesting features here is Fitness AGE. This feature gathers data from all-day activities, heart rate, and previous records to estimate if your body is older or younger than your current age. 

Garmin Venu 2 has a complete stress management system that is way better than the Fitbit EDA app to measure stress. Here, you can also see a graph showing your all-day stress trend, relax reminders will notify you to rest. The mindful exercises also allow you to lower your stress and increase focus. 

Garmin Venu 2 has added lots of exciting features for outdoor sports that allow you to achieve your outdoor goals. This smartwatch is Most recommended for heavy workouts or HIIT workouts. The preloaded on-screen workouts, cardio, yoga, and other high-intensity workouts allow you to track workouts effectively. 


Other Specs

It has a 1.1-inch AMOLED always-on display that makes it very easy to view the display whether you’re inside or outside.

The Garmin Venu 2 is composed of high-quality materials and has a stylish appearance. The watch has a great fit and is relatively light, making it very comfortable to wear.

It also comes with Corning Gorilla Glass 3 to help protect the gadget from damage done by collisions.

Furthermore, you may receive phone notifications, message alerts, email, and even social media updates immediately on your wrist when you wear this wristwatch.

The Garmin watch’s  battery lasts up to 10 days in smartwatch mode, while battery saver mode lasts 11 days.

Consequently, it’s the best watch with a pulse oximeter that also includes all of the fitness monitoring sensors you’ll need to keep track of your daily sports activities.

  • Always-on display
  • Built-in GPS
  • Stylish
  • Comfortable to wear
  • Accurate heart monitoring
  • Very Expensive
  • No map

7. Ticwatch Pro 3 GPS Smart Watch


CompatibilityBoth iOS and Android
Display1.4 inch, AMOLED/FSTN, Touchscreen
Internal Storage8 GB
IP RatingIP68
Battery Life3-45 days

Ticwatch Pro 3 is powered by WearOS and has Qualcomm Snapdragon Wear 4100. The watch has an excellent and smoother performance. To store music and apps, you will get 8GB of RAM.

This Wear OS watch features a SpO2 sensor to measure blood oxygen sensor. Although this feature drains more battery, it is still better than the rest of the smartwatches. It can show more quick results, and you can also take continuous blood oxygen saturation readings. 

The watch is equipped with all of the necessary sensors to monitor your active lifestyle. This fitness smartwatch can also keep track of your sleep patterns and bed time. It takes health monitoring to another level with powerful sleep-tracking functions. Users can even use this smartwatch to detect sleep disorders.

TicWatch Pro 3 also lets you know your stress level and offers different breathing exercises to reduce it. 10 sports modes in this watch track your outdoor activities, but it’s not recommended for you if you are a pro athlete. You don’t need to carry a phone when cycling or swimming because it has integrated GPS.

In addition, this smartwatch helps make calls and send texts. It also has a unique dual-screen, with an LCD panel placed on top of the wristwatch screen.

The Tic Watch Pro 3 has a battery that lasts two days in regular mode and 45 days in primary mode. It is twice the battery life of any other Wear OS smartwatch.

  • Dual display
  • Water-resistant up to 50 meters
  • Google pay
  • Built-in speaker
  • Accurately monitors heart rate
  • NO ECG
  • Lacks blood pressure monitoring
  • Not a durable watch

8- Amazfit Bip U Pro

Amazfit Bip U Pro 


CompatibilityBoth iOS and Android
Display1.43 inch, Transflective LCD, Touchscreen
Internal Storage3GB
IP Rating50m
Battery Life9 days

The Amazfit Bip U Pro is the most affordable option among smartwatches with blood oxygen sensors. The watch is equipped with fantastic fitness features to make your body healthy and fit.

The Amazfit Bip U Pro has a rectangular design similar to the Apple Watch. With a 1.43-inch HD color screen, you can see the display clearly. Besides, this GPS watch is very lightweight and comfortable to wear for a long time.

The most impressive feature of this smartwatch is that it has a blood oxygen monitoring sensor, which allows you to know your body’s exact oxygen saturation status at any moment.

Sadly, this watch’s readings are not the same as those provided by an oximeter. In most cases, the results will be very similar on both devices. So, this smartwatch is a perfect way to monitor your blood oxygen levels at all times.

Besides, the watch is loaded with several fitness features, including a 24/7 heart rate monitor, stress level, and sleep quality.

Other Features

Apart from blood oxygen monitoring, Amazfit includes a smart notification feature to see smartphone notifications on your wrist immediately. People may also use the watch to make and receive phone calls, which is very convenient.

Additionally, it has built-in GPS and GLONASS, which allow you to get exact and accurate tracking of your distance, speed, and location.

Moreover, this smartwatch is water-resistant up to 50 meters or 5 ATM, so you don’t have to take it off before taking a shower or swimming.

The watch has incredibly long battery life. When fully charged, the battery lasts for nine days. That means you can use and enjoy it for almost a week when fully charged.

Unfortunately, a significant flaw of this smartwatch is that it lacks a privacy mode. Plus, it doesn’t support third-party apps.

Overall, the Amazfit Bip U pro is an excellent smartwatch with excellent fitness and health-tracking features. It is, without a doubt, the best SpO2 smartwatch under $100.

  • Accurate GPS
  • Monitor stress level
  • Water-resistant
  • Long battery life
  • Budget-friendly
  • Results are not accurate
  • It doesn’t support third-party apps

9- Samsung Galaxy Watch 4



OSWear OS 3.0
CompatibilityBoth iOS and Android
Display1.2 inches, 396 x 396px
Internal Storage16 GB
IP Rating50m
Battery Life1day+

Next on our list is the Samsung Galaxy Watch 4. The Galaxy Watch 4 is designed to be a fantastic companion for your active lifestyle. This device is not just ideal for those who lead busy lives, but it is also one of the best oxygen monitor smartwatches available.

With this smartwatch, you can keep tabs on your blood’s oxygen saturation level. Furthermore, it monitors your heart rate and allows you to track your heart rhythm using the ECG app.

It also includes sleep, stress, and women’s healthcare tracking features. In addition, the Samsung Galaxy Watch 4 keeps track of all of the standard health metrics. It keeps records of your daily steps taken and calorie consumption.

Other Features

When it comes to aesthetics, the Galaxy Watch 4 maintains its predecessors’ clean and minimalist style. But this time, the Watch 4 has a sleek aluminum metal frame that gives it a premium appearance. The dial is protected by tough Gorilla Glass DX+, making it a more durable smartwatch.

It comes with a 1.4 inches Super AMOLED display that looks more vibrant and offers 450 x 450 pixels resolutions. Aside from that, the Galaxy Watch 4 feels considerably lighter due to its 30g weight, and its silicone straps make it more comfortable to wear for a longer time.

With this smartwatch, you will also get a great storage space. The internal memory of the Galaxy Watch 4 is 16 GB, allowing you to store thousands of tracks. Plus, you can install third-party applications due to this enormous storage space.

Fall detection is another excellent function on the Samsung Galaxy Smartwatch. In the event of a severe fall, this watch’s sensors will deliver an SOS message to the emergency services.

The watch also features built-in GPS to track your pace, speed, and distance.

Also, this SpO2 smartwatch has a water-resistance rating of 5 ATMs. As a result, you’ll be able to wear this watch while swimming or bathing. However, this smartwatch is not suitable for scuba diving.

Regarding the battery life, Samsung claims that the Galaxy Watch 4 can last up to 40 hours under regular use, which is quite impressive.

Overall, the Samsung Watch 4 is an excellent choice if you’re searching for a smartwatch that can monitor your SpO2 accurately.

  • Attractive design
  • Durable construction
  • Lightweight
  • SpO2 monitoring
  • Sleep tracking
  • Comfortable to wear
  • Expensive

10- Fossil Gen 6



OSWear OS 3.0
CompatibilityBoth iOS and Android
DisplayIP1.28 inch, AMOLED, Touchscreen
Internal Storage8 GB
IP Rating30m
Battery Life24+ hours

Fossil Gen 6 is another smartwatch with blood oxygen sensors that offers precise results. It has a sporty appearance and a stunning full-color touchscreen.

The watch features a 1.28 inch AMOLED display that looks more attractive. Moreover, high-resolution displays make it easy to see even in direct sunshine.

When it comes to the bezel, Fossil has included high-quality aluminum, making it scratch-resistant. Additionally, this smartwatch features interchangeable bands, allowing you to customize your look.

One of the best features of Fossil Gen 6 is SpO2 monitoring. This feature can help you know your blood oxygen level accurately.

 Besides monitoring your SpO2, it may also track your heart rate throughout the day. Also, the sleep tracking feature of this smartwatch is exceptional.

Other Features

Apart from fitness features, Fossil Gen 6 is loaded with all the essential features you need. It contains a built-in GPS that lets you keep track of your route, speed, and distance.

In addition, the watch comes with a built-in microphone and speaker, which allow you to make and receive phone calls from your wrist. 

Aside from that, the smartwatch has an 8GB internal storage capacity and 1GB of RAM so that you can store thousands of songs in your playlist.

Unfortunately, the watch has a water resistance rating of just 3 ATMs, which means that you can’t go for a deep swim when wearing Gen 6.

In terms of battery life, this watch can last for 24 hours. Even though it isn’t good, but it also offers fast charging, which is a big plus.

The watch also comes with a manufacturer’s warranty of two years, so that you can buy it with confidence. So overall, if you are looking for the best smartwatch with an oxygen sensor, Fossil Gen 6 is a great deal for you.

  • Sleek design
  • Great display
  • Interchangeable straps
  • Fast charging
  • Comfortable to wear
  • Low water resistance rating

11- Amazfit GTS 2 Mini Smartwatch

smartwatch with blood oxygen sensor


CompatibilityBoth iOS and Android
Display1.55 inches AMOLED
Internal StorageN/A
IP Rating50m
Battery Life12 days (Typical usage) 7 days (heavy usage)

No doubt, Amazfit GTS 2 Mini is a more helpful smartwatch than most of its competitors because of the SpO2 sensor.

Therefore, you can perform this test quickly, and the results will be substantially identical to those obtained with a certified oximeter.

When it comes to displaying, the GTS 2 Mini is available in black, pink, and green, with a 40mm case and an 8.95mm thickness. Polycarbonate and an aluminum alloy are the building material of its casing.

You’ll also get dozens of stunning watch faces, with the majority of them featuring a unique Always-on Display.

Moreover, a GPS tracker allows you to track routes and make your trip more convenient and enjoyable.

Other Features

The Amazfit GTS2 Mini has a 50m water-resistant rating. It means you can wear it while showering or swimming for brief periods.

Aside from that, it can keep track of your steps. So you can see how many steps you’ve taken and how many calories you’ve burned.

It can also track the quality of your sleep and your stress level.

The watch has an Alexa built-in so that you may control it with your voice. Users may also use this watch to make and receive phone calls.

The watch boasts a 14-day maximum runtime, which is a fantastic feature. Furthermore, charging the entirely exhausted battery took 1:45 hours.

Overall, this timepiece will be the best smartwatch with a blood oxygen sensor in 2021.

  • Stylish look
  • Vibrant AMOLED display
  • Monitor heart rate
  • Long-term durability
  • Sleep tracking
  • No third-party app support

12- Yamay Smartwatch

YAMAY should be at the top of your list if you’re looking for a smartwatch with an oxygen sensor at a reasonable price. The watch is reasonably priced, but the functions it offers are pretty sophisticated.

This watch’s build quality and design are both elegant and long-lasting. 

It has a smooth round screen with no protruding bezel, giving it a luxurious and attractive appearance. The watch has a sensitive touch screen and a 1.28′′ TFT display.

The strap is silicone rubber and has a typical ardillon buckle, making it very pleasant to use daily.

Its oxygen sensor can detect the amount of oxygen in your blood, and the reading you’ll obtain is relatively accurate. Still, because the watch is inexpensive, you shouldn’t compare it to a specialist oximeter.

Other Features

Aside from the oxygen sensor, the watch contains other health-tracking capabilities such as heart monitoring, sleep tracking, and blood pressure monitoring. As a result, you’re receiving a lot more value for your money.

The battery life of the watch is quite impressive. It runs efficiently for 10 to 12 days on a single charge. The battery lasts a long time, so you don’t have to charge it every day.

Overall, it’s the most affordable SpO2 smartwatch.

  • Affordable
  • IP68 Waterproof
  • Comfortable to wear
  • Extended battery life
  • Durable
  • Lacks always-on display

Best Smartwatch with Oxygen Sensor – Buyer’s Guide

When choosing an oxygen sensor watch, there are several factors to consider. These aspects will assist you in achieving more consistent results, which will allow you to live a better life.

1- Oxygen Sensor

The oxygen sensor is the most crucial feature, especially if you are searching for a smartwatch with an oxygen sensor; hence it is a must-have in the smartwatch.

Some watches can only record blood oxygen saturation at night, while others can measure it continually. 

If you have respiratory problems, you should invest in a wristwatch that can measure blood oxygen levels at any time.

2- Display and Design

While purchasing an oxygen sensor smartwatch, always check that the fitness tracker is light and comfortable to wear. 

A lightweight and compact fitness tracker will be more convenient because you’ll be wearing it for an extended period.

Also, make sure the display is visible to you, mainly if you are a senior or have visual issues.

3- Compatibility

Please don’t buy a smartwatch until you’re sure it’ll operate with your phone. The best oxygen sensor watches, on the other hand, must work with both Android and iOS devices.

4- Accuracy

A smartwatch is worthless if it is not accurate. Before purchasing any watch with blood oxygen sensor, ensure that it is accurate. 

The majority of smartwatches have poor sensors and produce misleading results, which might be problematic in the future.

5- Additional Functions

Fitness watches routinely measure many things in the body. The watch should track blood pressure, sleep quality, and stress levels with an oxygen sensor. 

It should also have a GPS tracker to help you with your travels. As a result, select the smartwatch that best suits your needs and lifestyle.

6- Battery life

The battery life of any smartwatch is essential. Pick a watch with longer battery life if you don’t want to charge it every 2-3 hours of use.

Please note that the quantity of usage impacts how long a device’s battery lasts.

What is SpO2?

SpO2 is one of the important fitness tracking metrics that tracks the amount of oxygen in your blood. In other words, you can say that SpO2 tells about the amount of oxygenated blood in blood. 

If the cells in your body contain a maximum amount of oxygen, then it is better for your health as such cells produce more energy in your body. In a nutshell, SpO2 tells you about your body’s overall wellness. 

Most smartwatches use SpO2 sensors to calculate your overall day performance, sports performance, and other activities. You can also manually measure the SpO2. Usually, a smartwatch takes 30 seconds to give blood oxygen saturation readings manually. 

In a few smartwatches, this feature is called Pulse Oximeter. Especially in Garmin watches, SpO2 is named Pulse Oximetry, which is the same thing. 

How does the SpO2 Sensor Work?

The working of the SpO2 sensor is pretty simple. It contains two light diodes, and one emits red light and another infrared light. When you measure blood oxygen saturation level, both light passes through your blood cells. If there is enough oxygen in the blood, it absorbs more infrared light and lets more red light.

Similarly, if blood doesn’t have enough oxygen, it absorbs red light and lets in more infrared light. The smartwatches use algorithms that calculate the estimate of red light or infrared absorption and give SpO2 value. 

Why is SpO2 important?

SpO2 is an important metric that helps us know about our health’s current situation as oxygen is the essential element in the human body. If your body cells are absorbing enough oxygen, it means you are healthy and fit; otherwise, you might face a lot of health issues. 

When someone is ill, their blood oxygen level drops in most cases. So with a smartwatch, you can immediately track your blood oxygen saturation level. In case your oxygen level drops, you can contact a doctor. 

Apart from this, the SpO2 feature is also handy for athletes and mountaineers. With the change in altitudes, their blood oxygen saturation level drops to measure it on a smartwatch. Athletes use this feature during their HIIT activities to check how their body absorbs oxygen during certain activities. This shows the overall performance of their activities.

What is the optimal Blood oxygen saturation score?

Understanding SpO2 value is an easy job. According to health.state.mn.us, if your blood oxygen saturation is above 95%, it indicates that your body cells have enough oxygen.

But if your SpO2 is less than 95%, then you should consult with your doctor. People with chronic lung disease can have an average SpO2 level of 90%. 

Transmittance Oximetry VS Reflectance Oximetry

There are two major methods to measure blood oxygen saturation level, one is Transmittance Oximetry, and the second one is Reflectance Oximetry. 

In transmittance oximetry, there are two types of sensors used. The first sensor emits light which passes through your finger and then hits the sensor on the other side. The second sensor reads the nature of light and its wavelength, depending on the wavelength, and it gives an estimate of SpO2. 

The Reflectance Oximetry used in most of the smartwatches, as the name suggests, reflects light from your blood and then again touches the sensor. 

Among this two oximetry, transmittance gives more accurate readings as the light has passed through a part of the body. 

But accuracy also depends on many other factors like algorithms and the quality of sensors. Brands like Apple and Samsung use more efficient algorithms that accurately measure the amount of oxygen in your body. Over time, we have seen that every smartwatch brand is constantly improving the efficiency of their sensor to make their devices more valuable.

Two Types Of Smartwatches With SpO2 Sensor

There are two types of smartwatches with the blood oxygen sensor, and both have different functions and ways to measure SpO2 performance.

Smartwatches With Nightly SpO2

Few smartwatches measure your blood oxygen level at night, and they don’t offer on-demand SpO2 monitoring. You can view the previous days or week records on their apps.

Smartwatches like the Fitbit sense and Versa 3 fall in that category of smartwatches that measure highly SpO2. But these watches are not very attractive to people.

Smartwatches With Real-time SpO2

Watches like Apple and Samsung Galaxy series can measure real-time SpO2. Whenever you feel some weakness in your body, you can check the blood oxygen saturation level. This smartwatch takes 30 seconds to give SpO2 readings. 

Should You Buy A Smartwatch With a Blood Oxygen Sensor?

Yes, if you have health issues or you are an athlete, then definitely a smartwatch with a SpO2 sensor is a must-have gadget for you. But you should invest in a smartwatch that has FDA approved blood oxygen sensor. The smartwatches mentioned above come with precise sensors that give estimated results closer to actual values. 

Especially if you are a pro athlete, a smartwatch with a SpO2 sensor helps you a lot. You can deeply check your performance during activities and see previous records. All this data enables you to improve your weak points and enhance your sports performance.

Apart from SpO2 features, smartwatches give a variety of other health features too. You will get an ECG app, stress tracking, calories counter, sleep tracking, and more. All these features help you track your daily routine and bring positivity to your lifestyle. 


Are Pulse Oximeters Of Smartwatches Are Accurate?

No, the Pulse Oximeters on the smartwatches are not 100% accurate. We recommend you buy the medically certified oximeter for 100% accurate readings.

Can Smartwatch Replace Oximeter?

Undoubtedly, smartwatches are best for keeping an accurate track of your blood oxygen levels. But when it comes to preciseness, they can’t beat the medical diagnosis and can’t replace the medical-grade oximeter.

Can A Pulse Oximeter Detect Heart Attack?

Yes, a pulse oximeter can detect heart attacks and other medical conditions that affect the level of oxygen in a person’s blood.

Which Pulse Rate In The Oximeter Is Considered Good?

Pulse rates that are above 95% are considered reasonable in the oximeter. An oxygen saturation level of less than 90% indicates hypoxemia or a lack of oxygen in the body’s organs and tissues.
When SpO2 is less than 80%, it indicates very poor oxygenation and may be fatal.

How Pulse OX Sensor Of The Smartwatch Works?

The pulse oximeter (infrared light sensors) in a smartwatch measures the blood oxygen saturation levels by emitting light at two different frequencies.
Using the time for the light pulses to return, the blood oxygen monitoring sensor calculates your SpO2 level.

Which Finger Should Be Used While Using A Pulse Oximeter?

Researchers have found that the middle finger of your right hand produces the most satisfactory results. Use warm fingers and avoid using cold fingers since readings will be inaccurate. Remove any nail paint before using it.

Lack Of Oxygen Causes What Symptoms?

Symptoms like breathing difficulties, headaches, fast breathing, uneasiness, disorientation, chest discomfort, elevated blood pressure, and disorientation show that your blood has lacked oxygen.

Can Anxiety Results In The Low Blood Oxygen Levels?

As a result of stress, your body tightens up, and you breathe more heavily. When you take a short breath, your blood oxygen level drops, which is perceived as a cause of stress by the brain. As a result, breathing becomes faster and faster. Eventually, less oxygen is present in the air.


Finally, here are seven of the best smartwatches with blood oxygen sensors. These watches can be used to determine your blood oxygen level. These watches, however, cannot be used in place of certified medical devices.

Finally, if you want a smartwatch with an oxygen sensor for your Apple mobile, the New Apple Watch Series 6 is the ideal watch for you. The Samsung Galaxy Watch Active 2 or Fitbit Sense are the two best options for Android phone users.

I hope you found this article on the best smartwatch with a blood oxygen sensor helpful in your search for a new fitness watch.

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