Blood Oxygen App

Blood Oxygen App

SpO2 Level Monitor・Heart Rate

31K ratings
860 reviews
#29 in top-grossing Medical
💪 Health & Fitness
🏥 Medical
Free
In-App Purchases

Details

Released
December 3, 2020
Updated
October 26, 2026

Features

Blood Oxygen App screenshot #1 for iPhone
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Blood Oxygen App screenshot #8 for iPhone
iphone
watch
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About

Monitor blood oxygen levels and heart rate using your phone's camera or by syncing with your Apple Watch. Track vital signs, share data with your doctor, and access curated health articles. Includes breathing exercises and sleep reports.

✓Blood oxygen monitoring
✓Heart rate estimation via camera
✓Apple Watch sync
✓Data logging and export (PDF)
✓Box breathing exercises
✓Sleep reports
Show original description

What users say about Blood Oxygen App

See all reviews

What's New in Blood Oxygen App

2.68

October 26, 2026

Bug fixes.

10

Subscriptions & In-App Purchases

Premium features (all)

Premium subscription for one year

$19.991 Year
7 Days trial
How to cancel Blood Oxygen App subscription ⁉️

Charts

Top Grossing

📈 29+1

Medical

This app rose +1 position in Medical chart.

Last updated on November 4, 2026.

Events

Read more about Blood Oxygen is back on Watch

Blood Oxygen is back on Watch

Measure with Health and Apple Watch

Aug 15, 2025 — Sep 15, 2025

Read more about Celebrate World Oxygen Day

Celebrate World Oxygen Day

Celebrate it with Blood Oxygen app's new features

Oct 1, 2024 — Nov 1, 2024

Read more about Celebrate World Heart Day

Celebrate World Heart Day

Celebrate World Heart Day with Blood Oxygen App

Sep 30, 2024 — Oct 29, 2024

User reviews

Theft

This is blatant theft. Misleads you and then tricks you into paying a weekly subscription. But it takes a years out immediately. How do I get my money Back ?

Don’t buy

This App is a joke. It measures O2 by asking questions. I should have just thrown $25 in garbage can. I want a refund. I won’t quit until I get one. If I could have gave 0 stars.

This is a scam.

It doesn’t do the job. And it seems like you can’t cancel it once you’ve been stupid enough to buy it.

Waste of Money

The app hasn’t recorded the O2 estimates for 3 weeks and often uses a few questions instead of an actual measurement. Don’t buy it!

What good is manually entered data?

I got fooled by Google trying to use my Apple Watch oxygen sensor. It says you have to get this app. This app is not that. This app only allows you to manually enter it. What a scam, and this is the first and only app that Apple does not allow me to request a refund on.

Developer apps

User experience

🐞

Reported Bugs

3 issues

App crashes and freezes frequently

Bug

Inaccurate heart rate and oxygen level readings

Bug

Compatibility issues with certain Apple Watch models

Bug
✨

Requested Features

3 requests

Add audible/vibration alerts for low oxygen levels

Feature

Improve automatic oxygen level monitoring

Feature

Provide more control over reading frequency

Feature

FAQ

What does the Blood Oxygen App do?

This app allows you to monitor your blood oxygen levels and heart rate. You can use your phone's camera to estimate heart rate and sync with your Apple Watch for blood oxygen readings. It also provides features like data logging, export options, breathing exercises, and sleep reports.

How can I monitor my blood oxygen and heart rate with this app?

You can monitor your blood oxygen and heart rate by syncing with your Apple Watch. Additionally, the app can estimate your heart rate using your phone's camera. The data can then be logged and tracked within the app.

Is the Blood Oxygen App free to use?

The app is free to download and use for its basic features. However, a subscription is available to unlock additional functionalities. You can cancel your subscription at any time through the App Store.

What devices is the Blood Oxygen App compatible with?

The app is designed to work with iPhones and can sync with Apple Watch devices. Specific features like sleep reports require an Apple Watch Series 3 or later with watchOS 8.

Can I share my health data with my doctor?

Yes, you can easily log and export your blood oxygen and heart rate data into a PDF format. This allows you to share your vital sign readings with your doctor for their review.