O2 Buddy: Blood Oxygen SpO2

O2 Buddy: Blood Oxygen SpO2

Saturation Levels & Trends

44 ratings
21 reviews
#7 in paid Health & Fitness
🌟 Lifestyle
💪 Health & Fitness
$0.99

Details

  • Released
  • Updated

Features

O2 Buddy: Blood Oxygen SpO2 screenshot #1 for iPhone
O2 Buddy: Blood Oxygen SpO2 screenshot #2 for iPhone
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About

Easily monitor your blood oxygen levels with real-time data and clear charts. Track daily averages and wellness trends, with instant syncing from HealthKit to your Apple Watch. Your health data remains private and secure on your device.

Real-time blood oxygen readings
Clear charts and instant data
Syncs with HealthKit
Apple Watch integration
Daily average comparisons
Private and secure data storage
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+1

What's New in O2 Buddy

1.5

July 30, 2026

Version 1.5 is the biggest update yet - a whole new way to see your blood oxygen over time! TRENDS ON THE MAIN SCREEN The chart at the top has been rebuilt. Switch between 24 hours, 7 days, 30 days, and 90 days, and see each day's full range along with its average. O₂ Buddy remembers whichever range you used last. NEW: DAY VS NIGHT Tap the moon to compare your daytime readings against your overnight ones. If you wear your watch to sleep, try this one first. RICHER READING DETAILS Tap any reading to see where it fell that day, how it compares to readings taken around the same time on other days, and whether it's normal, below normal, or low. NEW TREND WIDGET A new Home Screen widget shows your 7-day trend at a glance, in small and medium sizes. NEW WATCH COMPLICATIONS • A color-coded gauge ring for circular slots • A 7-day trend sparkline for rectangular slots • Older readings now dim, so you always know when you're looking at stale data FASTER, MORE RELIABLE SYNC New readings reach your watch and complications faster, and complication updates now keep working reliably all day long. A FRESH LOOK Onboarding has been redesigned, and you can now set the app to Light, Dark, or Automatic in Settings. Plus a tip jar for anyone who'd like to support development - entirely optional, and it unlocks nothing. Thanks for using O₂ Buddy!

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Charts

Top Paid

The app has maintained its position at 7 recently.

Last updated on August 1, 2026.

Top Paid

📉 171-3

Global

This app dropped -3 positions in Global chart.

Last updated on August 1, 2026.

User reviews

Blue Blood

This app is easy to use and beneficial for tracking your daily health. It is easy to set up and send notifications of the information to your phone. I like how everything flows and is easy to setup.

Doesn’t list which watches it works with.

I have a SE2 and an iPhone13. The app says it works with the iPhone, but does not say that it doesn’t work with the SE2 watch.

Response from developer

Sorry about that. The SE2 doesn’t have the blood oxygen sensor. Sadly Apple doesn’t let me reject watches. You may still be able to request a refund from Apple.

Thank you

Just helped someone setup their first Apple Watch. They are 79. You made my day. I don’t own a watch, I bought the app to show my appreciation.

O2 Buddy: Used to be more useful

I really miss the old on‑watch graph view. The current list of readings is much less useful at a glance, and only showing yesterday’s average makes today’s data feel incomplete. The mini trend graph on the watch was what made O2 Buddy stand out—please consider bringing a simple graph view back for recent readings and today’s evolving average.
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Waste

Waste of money

Response from developer

So sorry you feel that way. Did you have an issue with the app?

Developer apps

FAQ

What does O₂ Buddy do?

O₂ Buddy provides a fast and seamless way to view your blood oxygen (SpO2) readings. It displays your latest data in clear charts, syncs instantly from HealthKit, and allows you to compare daily averages to understand your wellness trends.

How does the app handle my health data?

The app is designed for privacy and security. Your blood oxygen data stays on your device and utilizes Apple's secure HealthKit storage. No data is shared externally.

Is O₂ Buddy compatible with Apple Watch?

Yes, the app is specifically designed for Apple Watch, offering lightweight, fast, and glanceable access to your SpO2 readings. New samples recorded on your watch sync immediately for viewing.

Who would benefit from using this app?

This app is ideal for anyone who is tracking their sleep, fitness, or overall wellness and wants an easy and accessible way to monitor their blood oxygen levels. It helps in understanding wellness trends at a glance.

Is there a cost to use O₂ Buddy?

Based on the provided information, O₂ Buddy is available for free. It does not appear to have any in-app purchases or advertisements.