PulseO2: Blood Oxygen Tracker
SpO2 on Your Watch Face
$4.99 · Designed for iPhone. Not verified for macOS.
Made for iPhone Duo. One price, one time: every feature included, no subscriptions or in-app purchases. Your Apple Watch Blood Oxygen readings, back on your wrist.
Your Blood Oxygen. Back on your wrist.
Your Apple Watch measures your blood oxygen throughout the day and night. PulseO2 puts those readings where you can see them at a glance: on your watch face, in the app, and on your iPhone. In the US, where Blood Oxygen results appear only in the Health app on iPhone, PulseO2 brings every new reading back to your wrist automatically.
ONE PRICE. ONE TIME. EVERYTHING INCLUDED.
Buy PulseO2 once and every feature is yours. No subscriptions, no in-app purchases, no tip jars, no premium tier, and no ads. Every chart, every complication, every widget, and every future update is included.
ON YOUR WATCH FACE
• Circular, corner, and inline complications with your latest reading on a color-coded gauge
• A large complication with your choice of trend: 24 hours, 7 days, or 30 days, each also in Color (green, yellow, and red by level)
• Add more than one to see today and the past month side by side
• Readings dim once they're more than 4 hours old, so you always know how current they are
ON APPLE WATCH
• Your latest reading, last night, and the past 24 hours
• A 24-hour graph with today's average so far
• Today, yesterday, 7-day, and 30-day averages with time-in-range bars, plus a 7-day chart
WAKE UP TO LAST NIGHT
• Your overnight average and lowest reading
• How much of the night was below 95% and below 90%
• Uses your sleep times from Health, or 10 PM to 8 AM if you don't track sleep
• A morning notification sums up your night
SEE THE BIGGER PICTURE
• Trends for 24 hours, 7 days, 30 days, and 90 days
• Each day's average, low, and high, and how your average compares with the period before
• Day vs. night: your readings while asleep and awake, side by side
• Time in range: 95% and above, 90–94%, and below 90%
• Readings per day, and the times of day your watch measured
EVERY READING IN CONTEXT
• Tap any reading to see its level, where it fell within its day, and how it compares with readings taken around the same time on other days
LOW OXYGEN ALERTS
• Optional notifications when a reading falls below a level you choose
ON IPHONE
• Home Screen and Lock Screen widgets for your latest reading
• A 7-day trend widget in small and medium sizes
• Built-in questions and answers
MADE FOR IPHONE DUO
Open your iPhone Duo and PulseO2 uses both sides: your latest reading, last night, and the past 24 hours on one side, your trends on the other. Fold it like a laptop and they sit above and below the fold. Trends and reading details spread across both sides too.
AUTOMATIC
New readings reach your watch on their own. In the US, they're sent from your iPhone as it saves them to Health; iOS protects Health data while your iPhone is locked, so readings taken overnight reach your watch shortly after you unlock your iPhone in the morning.
PRIVATE BY DESIGN
No account. No ads. No tracking. PulseO2 makes no network connections. Your readings go only from your iPhone to your own Apple Watch.
REQUIREMENTS
• An Apple Watch that measures blood oxygen (Series 6 or later, or any Apple Watch Ultra), with Blood Oxygen set up in the Health app
• For readings while you sleep, turn on Blood Oxygen Measurements in the Watch app on iPhone (My Watch > Blood Oxygen)
• PulseO2 shows readings your Apple Watch has already taken. It can't start a measurement; use the Blood Oxygen app on Apple Watch for an on-demand reading.
PulseO2 is intended for general fitness and wellness purposes only. It is not a medical device and is not intended to diagnose, treat, or prevent any disease or condition.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Made for iPhone Duo
• Open your iPhone Duo and PulseO2 uses both sides: your latest reading, last night, and the past 24 hours on one side, Trends on the other.
• Fold it like a laptop and today sits above the fold, with Trends below.
• Trends, reading details, and the welcome screen spread across both sides too.
On every other iPhone, PulseO2 looks and works just as before.
The developer, Get Happy, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Get Happy, LLC
- Size
- 4.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 - Get Happy, LLC
