Smartwatches have long had many health-tracking features, but there’s a growing trend in the market for smartwatches with blood oxygen monitors (pulse oximeter) to track the oxygen saturation in your blood.
I primarily use a smartwatch for its health and fitness tracking, so I see the appeal of a smartwatch that monitors your blood oxygen. So I’ve been researching the market to find the best devices with pulse oximeters and have shared everything I found in this guide.
My top pick is the Samsung Galaxy Watch 3 because it’s a great all-around watch that you can wear for any occasion. It has an accurate SpO2 monitor and other health trackings such as heart rate and ECG. The rotating bezel makes it a breeze to navigate, plus you can store music on it, use it to make calls, and respond to notifications directly on the watch.
Quick Picks:
Please keep reading for my complete breakdown of the best smartwatches that measure your blood oxygen, including an FDA-approved model, budget picks, and one with two-week battery life.
What You Need to Know About Blood Oxygen Monitors in Smartwatches
A blood oxygen monitor (also known as a SpO2 monitor or a pulse oximeter) measures the oxygen saturation of your blood.
You can use this to measure how well the heart is pumping oxygen through your body and detect conditions such as chronic obstructive pulmonary disease (COPD), asthma, and congenital heart defects.
A pulse oximeter must be approved as a Class II medical device by the FDA to be used for medical diagnosis. However, most pulse oximeters in smartwatches (except for Fitbit) have not received approval from the FDA as they have been positioned as informative rather than for medical purposes. This means you shouldn’t rely on them to diagnose or monitor health conditions.
So what else can an SPO2 monitor be used for? Well, they are particularly useful for endurance training, especially at altitude, where you can assess how well your body is coping with the atmosphere. They are also helpful in monitoring your sleep quality and can help detect sleeping disorders such as sleep apnea.
Best Smartwatches that Measure Blood Oxygen Levels
Best Overall: Samsung Galaxy Watch 3
Pros/Cons:
Accuracy rivals medical grade devices (although not FDA certified)
8GB of offline music storage
The rotating bezel makes it fast and easy to navigate
Battery life will only make 2 days
Samsung’s Galaxy Watch 3 is their latest flagship smartwatch and the only one in their range to offer bloody oxygen monitoring via an SPO2 sensor.
The blood oxygen data is integrated into the Samsung Health app, one of the better health apps on a smartphone. You’ll find your SpO2 readings under the Stress tab, where you can also take a spot reading.
Although the watch has not gone through FDA approval for its SpO2 monitor, a report by Medrxiv found that the same monitor found in Samsung’s S9 flagship smartphone did meet the accuracy required for such approval.
The Galaxy Watch 3 runs Tizen, Samsung’s open-source smartwatch operating system used in their wearables and other smart home gadgets. Even with third-party apps installed, the platform is speedy to navigate, aided further by the watch’s 1GB of RAM.
Thanks to 8GB of offline storage, you can store offline music and connect your headphones directly to it for tether-free use. It also has GPS, NFC for making contactless payments via Samsung Pay, and the ability to install third-party apps (although a more limited selection of apps than Google’s WearOS or Apple’s watchOS).
The best feature of this watch is Samsung’s signature rotating bezel used to navigate the user interface. With so many features and the ability to add third-party apps, you have to scroll through a fair amount of menus, however, the rotating bezel makes light work of this, and the feedback makes it easy to choose the right option.
🏆 #1 Best Overall
- WHY CHOOSE AKUMAKA G62 SMART WATCH? ① Stylish Design: Chic silver finish that complements any outfit; ② Bluetooth Calls & Messages: Stay connected hands-free; ③ Health Monitoring: Track heart rate, SpO₂, sleep, and BP in real time; ④ Fitness Modes: Multiple sports tracking to meet your goals; ⑤ Long Battery Life: 1000mAh battery for extended use; ⑥ Free App Support: Easy setup and detailed health insights; ⑦ Wide Compatibility: Works with Android and iPhone
- Elegant Smart Watches for Women: This smartwatch comes with a silver metal frame and a 1.83" HD screen, which is elegant and stylish overall. 2 different styles of watch bands (1 metal, 1 silicone) are perfect for work, casual wear and special occasions. In addition, there are more than 200 watch face styles to choose from, and you can also upload photos to customize your unique watch face
- Continuous Health Monitor: With the latest touch chip CST816D, high-sensitivity G-sensor STK8321 and PPG heart rate sensor HX3918 built in, AKUMAKA smart watches can monitor heart rate, blood oxygen, blood pressure and sleep accurately. The sleep tracker turns on automatically at night, and the other three can be measured automatically or manually at any time
- Bluetooth Calls Messages Notifications: After connect your phone and smartwatch, you can easily make and answer calls directly on your wrist, without holding your phone all the time. The watch will also receive real-time messages or app notifications from SMS, Facebook, WhatsApp, Instagram and so on. Bluetooth alerts is convenient, but note that you can't edit or reply to messages from your smart watch
- 5ATM Fitness Watch with 110+ Sports Modes: As a daily wearable activity tracker, it keeps recording your steps, distance and calories burned, and no need to take it off even if you sweat, wash your hands or it rains. This fitness watch supports 110+ sports modes, of which 8+1 sports modes are built into the watch system. No matter you like outdoor or indoor workouts, it will help you stay active and fit
Runner Up: Ticwatch Pro 3
Pros/Cons:
The dual-screen display gives a battery life of 3-5 days
Dedicated TicOxygen app for monitoring SpO2
Make and receive calls
Next up is the Ticwatch Pro 3 from Mobvoi. This is one of the best WearOS smartwatches on the market and the only one that currently has a pulse oximeter. As Google’s own software doesn’t yet have blood oxygen monitoring built-in, they have created a TicOxygen app that comes pre-installed to take readings.
This is in addition to the broad range of other apps that come bundled with the watch from Mobvoi, including TicZen for stress monitoring, TicBreathe for guided breathing exercises, and TicHearing, which measures environmental noise.
The pulse oximeter isn’t the only area that the Ticwatch Pro 3 outperforms the other WearOS watches on the market. It also features their signature dual screen with an overlaid LCD screen on top of the smartwatch screen.
The LCD screen shows the watch face similar to the display you’d find on a traditional digital watch. The underlying smartwatch screen will turn on instead when you use the smartwatch functions.
This is beneficial for the battery life as the LCD screen uses far less power. For this reason, the Ticwatch Pro 3 has a battery life of 3 days with regular usage or up to 5 days with light usage. This is almost double the battery life of any other smartwatch running WearOS.
Best for iPhone Users: Apple Watch Series 6
Rank #2
- 【Bluetooth Call and Message Reminder and AI Voice Assistant】 Hingso smart watches for women with Bluetooth 5.3 and a built-in DSP chip, enjoy ultra-clear call quality and zero lag. Stay connected on the go with real-time SMS and app notifications (Not supporting reply messages)—all from your wrist.
- 【24/7 Health Monitoring】 The fitness tracker watch is equipped with high-performance optical sensors that will record your all day activities, accurately monitors your heart rate in real time and it will monitor your blood oxygen levels, heart rate, stress, and sleep patterns. Sync all recorded data to your phone for insightful health analysis, empowering you to make informed lifestyle adjustments. Non-medical use
- 【120+ Sports Modes & 3ATM Waterproof – Train Smarter】 The sports watch from running and swimming to yoga and hiking, this fitness trackers supports 120+ activities with record via your phone. Fitness tracker watch measure steps, calories, distance, and duration accurately. The 3ATM waterproof rating means you can swim, shower, or sweat without worry—perfect for athletes and outdoor lovers
- 【Broad Compatibility】 The watches for women compatible with iOS 12.0 and Android 6.0 or above, including but not limited to iPhone 6~iPhone 17, Sa-ms-ung, Go-ogle pixel Nexus, Microsoft, Huawei, Xiaomi HTC and More, built-in Alexa, multiple functions such as alarm clocks, music control, stopwatch, timer, sedentary reminder, female menstrual cycle tracker, etc.
- 【Long-Lasting Battery Life】Enjoy 10 days of daily use or up to 30 days of standby with the fast-charging 340mAh battery. Packed with convenient features like music control, an upgraded alarm clock with ringtone reminders, weather updates, a calculator, remote photography, and more. This smart watch for android phones is the ultimate companion for work, fitness, and leisure
Pros/Cons:
New always-on display
Integrates with Apple Music, Apple Pay, and Siri
Large range of third-party apps
Only works with iPhones
Battery life of 18 hours
If you’re an iPhone user, then the Series 6 Apple Watch is a great choice. It’s the latest generation of the Apple Watch with the new blood oxygen app.
Whilst most blood oxygen monitors found in smartphones use a green light to measure oxygen saturation, the Apple Watch has green, red, and infrared LEDs that work together to compensate for natural variations in skin color (source).
The watch can either take a spot check of your blood oxygen or, with ‘background measurements’ turned on, it can periodically take a reading to provide readings across the day. It will attempt to take readings when you aren’t moving. Both spot readings and background readings can be seen in the Health app on your iPhone.
That’s not all that’s changed in the latest Series 6 device, it’s much faster than before, thanks to a new S6 SiP processor, which Apple claims improves app launch speed by 20%. It also introduces an always-on display and brings the digital crown with haptic feedback that Apple launched in the Series 5.
The biggest downside to the Apple Watch is that you can only use it with an iPhone, so it’s best avoided if you have an Android phone. However, if you have an iPhone, the watch integrates seamlessly with the rest of Apple’s Ecosystem, making it easy to access Apple Music, Apple Pay, and Siri.
As always with Apple, design plays a huge role, and the watch looks seamless and is comfortable to wear. The Series 6 comes in a choice of aluminum, stainless steel, and titanium with several band color choices.
Best for Battery Life: Amazfit GTR 2
Read our full Amazfit GTR 2 Review
Pros/Cons:
Premium looking design at an affordable price
Realistic 10-day battery life
Make calls from the device via the built-in microphone and speaker
Lift-to-wake can take a couple of seconds to wake the screen
The final watch on this list is the Amazfit GTR 2. This is the second Amazfit that I’ve included in these recommendations, however, the GTR 2 is a premium device from the up-and-coming smartwatch brand.
Unlike the Bip U, this device has a circular display and has upgraded from a plastic design to a stainless steel body, giving it a more luxury feel. The AMOLED screen is bright and works well when outside.
It has an always-on display, 3GB of onboard music storage, and a built-in microphone and speaker that allow you to take calls from your phone directly on your watch. However, you will still need your phone in range, as the watch doesn’t support a cellular connection.
The design is ideal for everyday use, but there are also a ton of fitness features too. For example, there is GPS for tracking your runs, 12 different sports tracking modes, and the blood oxygen monitor.
Battery life is where this smartwatch excels over the others shared here with a claimed 14 days from the manufacturer, although it is closer to a week when using multiple features on the watch in our tests.
As the watch does not have an always-on display, you’ll need to rely on the lift-to-wake action, although there is a slight delay of around 2 seconds for this to work.
Rank #3
- 【Bluetooth 5.3 with DSP Chip】Enjoy crystal-clear calls and instant notifications on your wrist. Our advanced Bluetooth 5.3 and built-in DSP chip deliver zero-lag audio, so you never miss a conversation—even on the move. (Note: Supports notifications but not message replies.)
- 【1.85" HD Touchscreen | 60Hz Smooth Display】Scroll seamlessly on a vibrant 1.85" HD screen with buttery-smooth 60Hz refresh rates. Personalize your watch face with your favorite photos—family, pets, or travel memories—to match your style.
- 【24/7 Health & Wellness Tracking】Smart sensors monitor your heart rate, sleep quality, stress levels, and more—helping you stay proactive about your health. Get reminders to hydrate, move, or unwind, tailored to your daily rhythms.
- 【100+ Sport Modes | IP68 Waterproof】From running to swimming, yoga to HIIT, track 100+ activities with precision. The IP68 waterproof design keeps up with your toughest workouts, rain or shine.
- 【7-Day Battery | iOS/Android Compatible】Work seamlessly with iPhone or Android phones. A single charge powers 7 days of use, with features like music control, weather alerts, and camera shutter—all at a glance.
FDA Approved: Fitbit Versa 3
Pros/Cons:
Pulse Oximeter approved by the FDA
Industry-leading sleep score
Alexa and Google Assistant built-in
Some advanced reports require Fitbit Premium subscription
Fitbit is the only smartwatch manufacturer that currently has its pulse oximeter approved by the FDA (Source) This means that they have proven the accuracy of the device compared to other medical-grade pulse oximeters that would usually clip onto your finger when being used by a medical professional.
Despite this approval that gives them a clear advantage over the competition, Fitbit still advises that their watches are intended for general wellness and discourage their use for managing any health conditions.
Fitbit is known for its industry-leading sleep score, which takes lots of data sources to provide a score and suggestions to improve. It uses time awake/asleep, how much REM sleep you got, and your heart rate. Fitbit has not yet added blood oxygen levels to be a factor in this score.
However, the watch will still track your blood oxygen levels while you’re sleeping and display average and SpO2 ranges on your watch face when you wake up. This is important because significant fluctuations in your blood oxygen at night can be indicative of asthma or sleep apnea.
Fitbit even has a dedicated SpO2 Signature clock face, this allows you to cycle through blood oxygen stats, among other vital measures easily.
Aside from these key health and fitness features, the Versa 3 has many apps that will come in handy for everyday wearing. For example, it has both Alexa and Google Assistant for issuing voice commands, Fitbit Pay for contactless payments, and a limited selection of third-party apps such as Uber.
Budget: Amazfit BIP U
Rank #4
![Smart Watch for Women Men Android & iPhone [2 Bands, 44mm case], Alexa Built-in, 1.83'' Smartwatch Make/Answer Call, HR SpO2 Sleep Stress Monitor Fitness Tracker, IP68 Waterproof Step Counter Watch](https://m.media-amazon.com/images/I/41wO9parXKL._SL160_.jpg)
- 【Please Charge the Watch to Activate】This smart watch requires initial charging to activate. Use the included charging cable. Download VeryFit app to sync with your smartphone. Compatible with Android 6.0+ and iOS 9.0+ devices. (𝐍𝐨𝐭 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐭𝐚𝐛𝐥𝐞𝐭𝐬 𝐨𝐫 𝐜𝐨𝐦𝐩𝐮𝐭𝐞𝐫𝐬)
- 【2 Straps, Zero Weight, All-Day Style】Two quick-release straps for instant style changes. This ladies smart watch features a 1.83" HD display weighing just 38g—so light that teens, women, and men forget it’s there. Enjoy razor-sharp colors with 360*440 resolution. Choose from 100+ watch faces to match your daily style.
- 【All-Day Health Guardian on Your Wrist】This women men smartwatch provides 24/7 monitoring of heart rate, SpO₂ and stress levels. Guided breathing exercises help restore calm. Automatically tracks sleep stages (𝐞𝐱𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐧𝐚𝐩𝐬). Women's cycle tracking and hydration reminders included.
- 【Your Personal Coach for 100+ Ways to Move】As a versatile fitness tracker watch, it offers 100+ sport modes with auto-recognition for running/walking. Tracks calories, steps and distance in real-time. IP68 waterproof for swimming and rain activities. 𝐃𝐨𝐧'𝐭 𝐰𝐞𝐚𝐫 𝐢𝐭 𝐢𝐧 𝐡𝐨𝐭 𝐛𝐚𝐭𝐡𝐬, 𝐬𝐚𝐮𝐧𝐚𝐬 𝐨𝐫 𝐝𝐢𝐯𝐢𝐧𝐠.
- 【Effortless Communication on the Go】Make and receive calls directly through VeryFit app. This reloj inteligente delivers instant notifications from apps like WhatsApp and SMS. Customize sound and vibration settings. Use Do Not Disturb mode when needed.
Pros/Cons:
Very affordable smartwatch
5-7 day battery life
Detailed health and fitness tracking via Zepp app
Cannot make contactless payments
No GPS for tracking your running routes
If you’re on a tight budget but still want to get a smartwatch with a blood oxygen monitor, you’re in luck, thanks to the new Amazfit Bip U.
This watch was crowned our favorite budget smartwatch because it packs in many features while still keeping a sub-$100 price tag. It excels at health and fitness tracking, in addition to the blood oxygen monitor, there’s also a heart rate monitor, sleep tracking, and sports modes for tracking your workouts.
Amazfit is known for having a great battery life in their products due to their lightweight proprietary operating system. Being at the budget end of their range, this one has a reduced battery capacity compared to the others in the range but still manages to last 7 days with light usage or 5 days with regular use.
There are some drawbacks to the device, for example, there is no GPS for tracking your running routes, nor is there an NFC chip, so you can’t make contactless payments with the device. But, if you’re just looking for some great fitness tracking and your daily fitness goals presented neatly in an intuitive app, the Bip U is ideal.
Best for Fitness: Garmin Vivoactive 4
Pros/Cons:
The pulse oximeter can monitor blood oxygen through the night
Training plans that adapt based on your performance
Onboard music storage and NFC
Garmin’s background in fitness trackers is evident from the features in their smartwatches. Their Vivoactive range sits nicely in-between fitness tracker and smartwatch with lots of handy features to monitor your health and fitness. Their latest flagship, the Vivoactive 4, also adds a pulse oximeter into the mix.
The pulse oximeter was first introduced in the earlier Vivoactive 3, but Garmin has continued to improve upon the usability in the Vivoactive 4, it can now monitor your blood oxygen throughout the night too. The watch can then alert you if it detects large changes in your blood oxygen throughout the night, this is a symptom of sleep apnea, although the watch will not specifically tell you this as it does not have FDA approval.
The pulse oximeter on the Vivoactive 4 will show your blood oxygen percentage alongside your current altitude, this is helpful for endurance exercise to see how your body reacts to the changing environment.
The Vivoactive 4 gets my pick as the best fitness watch with a pulse oximeter, this is thanks to advanced fitness tracking, animated onscreen workouts, over 20 preloaded sports to track, and the Garmin Coach app. The latter is particularly great as it provides personalized training plans that dynamically adjust based on your performance as recorded by the watch.
There is also a large selection of third-party apps you can install, most of which are fitness-related. Unlike the previous generation, the new Vivoactive 4 has onboard music storage so you can download tracks and listen to them tether-free during your workout.
💰 Best Value
- Bluetooth Calling and AI assistant: Built-in high-quality speaker and HD microphone, after connecting to your phone via Bluetooth, you can answer, reject or make calls directly from your smart watch. Built with an AI assistant, it enables smooth voice commands and hands-free calls.Smartwatch support information reminder.
- 24-Hour Healthy Partner: This fitness smartwatch use high-performance sports optical sensors, which can monitor our heart rate, stress, and sleep analysisin real-time 24 hours a day. The activity trackers automatically monitors your sleep status (deep sleep, light sleep, waking up) and analyses your sleep quality. It can also monitor blood oxygen, physiological cycle reminder. Connect the watch to the APP to check the body monitoring data, which can help you better understand your health status.
- 1.46" AMOLED HD Touch Screen and Customized Personalized Dial: This smart watch for women men is designed with a 1.46-inch AMOLED high-definition full touch screen, bringing you a unique visual and better interactive experience. The several level brightness is adjustable to choose the right brightness in different environments. There are up to 200+ watch faces for you to choose from on the "Runmefit" app, you can also customize your favorite photos as your smart watch face.
- 110+ Sports Modes and 3ATM Waterproof: This fitness tracker supports 110+ sports modes including walking, running, cycling, football, mountaineering, etc, records data such as steps, distance, calories and exercise time, helping you train scientifically and achieve your fitness goals. The running watch's strap is soft, and it's very comfortable to wear. Moreover, it has 3ATM level waterproof performance, waterproof and rainproof, can meet your daily waterproof requirements.
- Long-Lasting Battery and More Functions: The Android smart watch is equipped with a large capacity battery that can be used for up to 10 days on a single charge and has a standby time of up to 30 days. It can also work as an assistant: weather forecast, find phone, Stopwatch, Timer, Calculator, Alarm Clock and camera control, and so on. It's also a beautiful gift.
Best for Outdoor Sports: Coros Vertix
Pros/Cons:
Tough watch suitable for extreme conditions
Quick access to blood oxygen readings
Great battery life of 60 hours with full GPS
SpO2 recordings not saved in the app for tracking
No music storage
I mentioned in the introduction that bloody oxygen monitors are very useful for monitoring training at high altitudes. If that’s your reason for purchasing a smartwatch with a blood oxygen monitor, then the Coros Vertix is an excellent pick.
Coros will be a familiar brand to any elite runner or endurance athlete as their performance sports technology has played a role for many years.
This watch is suitable for almost any environment you can think of. It has a Sapphire screen that makes it very scratch resistant, it has an operating temperature of -4°F to 140°F, and it’s 15ATM rated, which means you can use it up to 150m underwater.
The watch runs its own proprietary operating system which is very much geared towards adventure sports tracking. This means it is missing some of the everyday features you might like from a smartwatch, such as music storage or NFC for contactless payments.
As for the SpO2 monitor, this can be quickly accessed by long-pressing the lower right button. When you’re at high altitudes, a gauge will appear to advise whether the reading is of concern or not.
The downside to the SpO2 monitor is that it’s only a spot check, and the readings are not saved within the app as with other models here. This means you cannot look at your blood oxygen over time, which the watch would benefit from in the future.
One final thing worth mentioning about this watch is the battery life which can last an incredible 45 days with regular usage or 60 hours with GPS on. If you’re an outdoor fanatic, this is well worth investing in.
Tips to Get a Good Blood Oxygen Reading on Your Smartwatch
Here are some key tips to ensure you are getting blood oxygen reading on your smartwatch that is as accurate as possible:
- Rest your arm on a surface with your palm facing downwards while you take a reading.
- Make sure the watch is not loose on your wrist.
- Ensure the watch is sitting flat on your wrist and ensure your wrist bone isn’t obstructing the pulse oximeter.
- If your hands are cold, you’ll get a better reading if you rub them together beforehand to get a bit of warmth. This is helpful if taking a reading at higher altitudes.
- If you have a tattoo on your wrist, try to ensure this is not directly under the pulse oximeter, as the saturation of the ink can make it difficult to get an accurate reading.