[ Web Proxy ]

Viewing: https://support.apple.com/guide/watch/blood-oxygen-apdaf17aa5ef/watchos

[Back] [Original]

Measure blood oxygen levels with the Blood Oxygen app - Apple Support

Apple
- Store
- Mac
- iPad
- iPhone
- Watch
- Vision
- AirPods
- TV & Home
- Entertainment
- Accessories
- Support
Search apple.com:

AppleWatch User Guide

Select version:

watchOS 26 watchOS 11 watchOS 10 watchOS 9 watchOS 8 watchOS 7

Modifying this control will update this page automatically

Table of Contents

Welcome
Introducing Apple Watch
Whats new
Set up and get started
- Set up Apple Watch
- Set up and pair your Apple Watch with iPhone
- Pair another Apple Watch with your iPhone
- Wi-Fi and cellular
- Use Apple Watch without its paired iPhone
- Turn on and wake Apple Watch
- Lock or unlock Apple Watch
- Charge and monitor the battery
Apple Watch For Your Kids
Basics
Personalize your Apple Watch
- Change the settings
- Change the language and orientation
- Adjust brightness and text size
- Adjust volume and haptics
- Choose alert sounds and haptics
- Remove, change, and fasten watch bands
- Organize apps
- View app settings and storage
- Customize notifications and Focus modes
  - Change notification settings
  - Use Focus
- Update your Apple Account
Apple Watch safety features
- Safety features
- Contact emergency services
- Set up and view Medical ID
- Use Check In
- Manage Fall Detection
- Manage Crash Detection
- Off-grid communication via satellite
  - Set up satellite communications
  - Use satellite features
Siri
Apple Watch faces
Run with Apple Watch
Track important health information
Apps
- Activity
  - Track daily activity
  - Adjust your Activity ring goals
  - Track your training load
  - Share your activity
- Alarms
- App Store
  - Get apps
  - Change settings
- Audiobooks
- Blood Oxygen
- Calculator
- Calendar
- Camera Remote
- Compass
  - Use the Compass app
  - View and add Compass Waypoints
  - Use Backtrack to retrace your steps
- Contacts
  - Contacts
  - Use NameDrop to share contact information
- Cycle Tracking
  - Use Cycle Tracking
  - Receive retrospective ovulation estimates
  - Track your pregnancy
- Depth
  - Measure underwater temperature, duration, and depth
  - Log your underwater activity
  - Configure the Depth app
- ECG
- Find People, Devices, and Items
  - Find People
    - View a friends location
    - Get directions to a friend
  - Find misplaced devices
  - Find Items
    - Locate an AirTag
    - Mark an AirTag as lost
- Heart Rate
  - Heart Rate
  - Heart Health
  - Receive hypertension notifications
- Home
  - Control your home
  - Use Grid Forecast to plan your energy usage
  - Send and receive intercom messages
  - Remotely access your smart home accessories
- Mail
  - Read mail
  - Write and reply to mail
  - Manage mail
- Maps
  - Find places and explore
  - Explore maps
  - Get directions
  - Use offline maps
- Medications
- Memoji
- Messages
  - Read messages
  - Send and reply to messages
  - Edit and unsend messages
  - Translate messages
  - Send stickers, animations, and more
  - Share your location
  - Share messages
  - Make a FaceTime audio call
- Mindfulness
  - Start a Reflect or Breathe session
  - Log your state of mind
- Music
  - Add music
  - Remove music
  - Play music
  - Do more with Music
  - Radio
- Music Recognition
- News
- Noise
  - Measure noise levels
  - Monitor your environmental noise exposure
- Notes
  - Create and view notes
  - Organize notes
- Now Playing
- Phone
  - Make phone and FaceTime audio calls
  - Accept or decline incoming calls
  - While on a call
- Photos
  - Choose a photo album and manage storage
  - View photos
  - Customize the Photos watch face
- Podcasts
  - Add podcasts
  - Play podcasts
- Reminders
  - Make and view lists
  - Edit and organize lists
- Remote
- Shortcuts
- Siren
- Sleep
  - Track your sleep
  - View your sleep score
  - Track your nightly wrist temperature
  - Receive sleep apnea notifications
- Stocks
- Stopwatch
- Tides
- Timers
- Use the Tips app
- Translate
- Vitals
- Voice Memos
- Walkie-Talkie
- Wallet
  - About Apple Wallet
  - Set up Apple Pay
  - Use Apple Pay for contactless payments
  - Use Apple Cash
  - Use Apple Card
  - Use passes
  - Use rewards cards
  - Ride transit
  - Home, hotel room, and vehicle keys
  - Vaccination cards
- Weather
  - Check the weather
  - See weather in other locations
- Workout
  - Get started
  - Complete a workout
  - Customize your workouts
  - Go for a run
  - Go cycling
  - Go for a swim
  - Change settings in Workout
- World Clock
Use Apple Watch with other devices
Accessibility
Restart, erase, recover, restore, and update
Get help
Safety, handling, and support
Copyright and trademarks

Measure blood oxygen levels with the Blood Oxygen app

Use the Blood Oxygen app on supported AppleWatch models to measure the percentage of oxygen your red blood cells carry from your lungs to the rest of the body. Knowing how well oxygenated your blood is can help you understand your overall health and wellness.

Note: Blood Oxygen app measurements are not intended for medical use. For models of Apple Watch purchased in the United States on or after January 18, 2024 with part numbers ending in LW/A, the Blood Oxygen data analysis is performed on iPhone, and results can be viewed in the Health app. Learn how to identify your AppleWatch.

What you need

Make sure the Blood Oxygen app [] is available in your country or region.
Update your iPhoneXS or later to the latest version of iOS.
Update your supported AppleWatch to the latest version of watchOS.

Note: The Blood Oxygen app is not available for use by people under 18 years old. You can confirm or set up your age in your Medical ID.

Set up Blood Oxygen

Go to the Settings app [] on your AppleWatch.
Tap Blood Oxygen, then turn on Blood Oxygen Measurements.

Measure your blood oxygen level

The Blood Oxygen app [] periodically measures your blood oxygen level throughout the day if background measurements are turned on, but you can also take an on-demand measurement at any time.

Go to the Blood Oxygen app on your AppleWatch.
Rest your arm on a table or in your lap, and make sure your wrist is flat, with the AppleWatch display facing up.
Tap Start, then hold your arm very still during the 15-second countdown.
At the end of the measurement, you receive the results. For models of Apple Watch purchased in the United States on or after January 18, 2024 with part numbers ending in LW/A, results cannot be viewed on Apple Watch, and are exclusively available in the Health app on iPhone. Tap Done.

Note: To get the best results, the back of your AppleWatch needs skin contact. Wearing your AppleWatch not too tight or too loose, with room for your skin to breathe, and flush with the top of your wrist, helps ensure successful Blood Oxygen measurements. For more information, see the Apple Support article How to use the Blood Oxygen app on AppleWatch.

Turn off background measurements when the Sleep Focus or Theater Mode is active

Blood oxygen measurements use a bright red light that shines against your wrist, which may be more visible in dark places. You can turn off measurements if you find the light distracting.

Go to the Settings app [] on your AppleWatch.
Tap Blood Oxygen, then turn off In Sleep Focus and In Theater Mode.

View your Blood Oxygen measurements history

Go to the Health app [] on your iPhone.
Tap [the Search button], tap Respiratory, then tap Blood Oxygen.

Previous Audiobooks Next Calculator

Helpful?

Yes No

Apple Footer

Support
AppleWatch User Guide
Measure blood oxygen levels with the Blood Oxygen app

Web Proxy Viewer | New URL | Original Page