Where To Find Oxygen Level On Apple Watch

by Barbara Wilson

Apple Watch has become a powerful tool for health and wellness. Among its many features, the ability to measure blood oxygen levels is particularly notable. This feature, available in Apple Watch Series 6 and later models, can help users monitor their respiratory health and overall wellness. In this article, we will provide a detailed, step-by-step guide on how to find and use the blood oxygen level feature on your Apple Watch.


Understanding Blood Oxygen Levels

Before diving into the specifics of using the Apple Watch to measure blood oxygen levels, it’s important to understand what blood oxygen levels are and why they matter.


What Are Blood Oxygen Levels?

Blood oxygen level, or oxygen saturation, refers to the amount of oxygen carried by red blood cells from the lungs to the rest of the body. This is typically expressed as a percentage. A normal blood oxygen level usually ranges from 95% to 100%.


Why Are Blood Oxygen Levels Important?

Maintaining the right blood oxygen level is crucial for overall health. Low levels can indicate respiratory or cardiovascular problems and may require medical attention. Monitoring your blood oxygen levels can help you keep track of your respiratory health, especially during physical activity or in high altitudes.


Apple Watch and Blood Oxygen Monitoring

Apple introduced the blood oxygen monitoring feature with the Apple Watch Series 6. This feature utilizes a combination of hardware and software to measure the oxygen levels in your blood.

Compatible Devices

Blood oxygen monitoring is available on the following devices:

Apple Watch Series 6

Apple Watch Series 7

Apple Watch Series 8

Apple Watch Ultra

Ensure your Apple Watch is updated to the latest version of watchOS to access the latest features and improvements.

How It Works

The blood oxygen sensor in the Apple Watch uses a combination of red and infrared light to measure the color of your blood. Advanced algorithms then calculate the percentage of oxygen present in your blood based on the color.

Setting Up Blood Oxygen Monitoring

Before you can measure your blood oxygen level, you need to set up the Blood Oxygen app on your Apple Watch and iPhone.

Setting Up on Apple Watch

Open the Blood Oxygen App: Locate the Blood Oxygen app on your Apple Watch. The icon resembles a red and blue droplet.

Follow On-Screen Instructions: The first time you open the app, you will see some on-screen instructions. Follow these to set up the app.

Enable Permissions: Grant the necessary permissions for the Blood Oxygen app to access and record your data.

Setting Up on iPhone

Open the Health App: Launch the Health app on your iPhone.

Navigate to Browse: Tap on the ‘Browse’ tab at the bottom of the screen.

Find Respiratory Section: Under ‘Respiratory’, tap on ‘Blood Oxygen’.

Enable Blood Oxygen Measurements: Follow the prompts to enable blood oxygen measurements.

Taking a Blood Oxygen Measurement

Once the Blood Oxygen app is set up, you can start taking measurements. Here’s how:

Using the Blood Oxygen App

Open the Blood Oxygen App: On your Apple Watch, open the Blood Oxygen app.

Stay Still: Keep your wrist flat and still with the watch facing up. Rest your arm on a table or your lap.

Start Measurement: Tap ‘Start’ to begin the measurement.

Wait for Results: The measurement takes about 15 seconds. Stay still during this time.

View Results: Your blood oxygen level will be displayed on the screen. The data is also saved in the Health app on your iPhone.

Using the Control Center

You can also measure your blood oxygen level from the Control Center.

Open Control Center: Swipe up from the bottom of the watch face to open Control Center.

Tap Blood Oxygen Icon: Tap the Blood Oxygen icon to start the measurement.

Follow On-Screen Instructions: Follow the same steps as in the Blood Oxygen app.

Viewing Blood Oxygen Data

The Apple Watch records your blood oxygen measurements and syncs them with the Health app on your iPhone. Here’s how you can view and interpret this data:

In the Health App

Open the Health App: On your iPhone, open the Health app.

Navigate to Respiratory: Tap on ‘Browse’ and then ‘Respiratory’.

View Blood Oxygen Data: Tap on ‘Blood Oxygen’ to view your measurements.

Analyze Trends: You can view your data over different time periods, such as daily, weekly, or monthly trends.

On the Apple Watch

You can view recent blood oxygen measurements directly on your Apple Watch.

Open the Blood Oxygen App: Open the Blood Oxygen app on your Apple Watch.

Scroll to History: Scroll down to view your recent measurements.

Using Blood Oxygen Data

Monitoring your blood oxygen levels can provide valuable insights into your health and fitness. Here are some practical ways to use this data:

During Physical Activity

Monitor your blood oxygen levels during workouts to ensure your body is getting enough oxygen. This can help you adjust the intensity of your exercises to avoid overexertion.

At High Altitudes

If you’re traveling to or living in high-altitude areas, use the blood oxygen monitoring feature to acclimate to the lower oxygen levels. This can help you avoid altitude sickness.

For Health Conditions

If you have a respiratory or cardiovascular condition, regularly monitor your blood oxygen levels to manage your health better. Share your data with your healthcare provider for more accurate diagnoses and treatment plans.

See Also: Where To See Apple Watch Battery Health

Troubleshooting Common Issues

Sometimes, you might encounter issues while using the Blood Oxygen app. Here are some common problems and solutions:

Inaccurate Measurements

Ensure Proper Fit: Make sure your Apple Watch fits snugly on your wrist. A loose watch can lead to inaccurate readings.

Stay Still: Movement can affect the accuracy of the measurement. Keep your wrist and arm still during the measurement.

Check Lighting: The sensor works best in well-lit conditions. Avoid taking measurements in low-light environments.

App Not Working

Update Software: Ensure your Apple Watch and iPhone are updated to the latest versions of watchOS and iOS.

Restart Devices: Restart your Apple Watch and iPhone to resolve any software glitches.

Re-enable Permissions: In the Health app, check that all necessary permissions for the Blood Oxygen app are enabled.

Advanced Features and Customization

The Blood Oxygen app on Apple Watch offers several advanced features and customization options to enhance your experience.

Background Measurements

Apple Watch can take periodic blood oxygen measurements in the background, especially during sleep. To enable this feature:

Open the Settings App: On your Apple Watch, go to the Settings app.

Tap on Blood Oxygen: Scroll down and tap on ‘Blood Oxygen’.

Enable Background Measurements: Toggle on ‘Background Measurements’.


Set up notifications to alert you if your blood oxygen levels fall below a certain threshold.

Open the Health App: On your iPhone, open the Health app.

Navigate to Blood Oxygen: Tap on ‘Browse’, then ‘Respiratory’, and ‘Blood Oxygen’.

Set Threshold: Tap on ‘Blood Oxygen Notifications’ and set your desired threshold.

Customizing the Watch Face

Add the Blood Oxygen complication to your watch face for quick access to measurements.

Press and Hold the Watch Face: Press and hold the current watch face.

Tap on Customize: Tap on ‘Customize’ and select a spot for the Blood Oxygen complication.

Add Complication: Scroll through the list of complications and select ‘Blood Oxygen’.

Comparing with Other Devices

Apple Watch’s blood oxygen monitoring feature is among the most advanced on the market. However, it’s useful to compare it with other devices.

Apple Watch vs. Dedicated Pulse Oximeters

Accuracy: While Apple Watch provides reliable measurements, dedicated pulse oximeters may offer slightly higher accuracy.

Convenience: Apple Watch offers greater convenience with its integration into daily wear and background measurements.

Functionality: Dedicated pulse oximeters are typically limited to measuring blood oxygen levels, while Apple Watch offers a broader range of health and fitness features.

Apple Watch vs. Other Smartwatches

Many smartwatches now offer blood oxygen monitoring. Here’s how Apple Watch compares:

Ease of Use: Apple Watch’s user-friendly interface makes it easy to measure and track blood oxygen levels.

Integration: Apple Watch seamlessly integrates with the Health app, providing a comprehensive view of your health data.

Advanced Features: Features like background measurements and notifications give Apple Watch an edge over many competitors.


The ability to measure blood oxygen levels on your Apple Watch adds significant value to an already versatile device. By following the steps outlined in this article, you can set up, use, and interpret the blood oxygen monitoring feature to improve your health and wellness. Whether you’re an athlete, someone with a medical condition, or simply interested in keeping track of your health, the Apple Watch’s blood oxygen monitoring feature offers a convenient and powerful tool to meet your needs. Keep your devices updated and explore the advanced features to make the most out of this technology.

By understanding and utilizing the blood oxygen level feature on your Apple Watch, you can gain deeper insights into your health and make more informed decisions about your wellness journey.


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