Blood Oxygen App

Blood Oxygen App

SpO2 Level Monitor・Heart Rate

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

Details

  • Released
  • Updated

Features

Blood Oxygen App screenshot #1 for iPhone
Blood Oxygen App screenshot #2 for iPhone
Blood Oxygen App screenshot #3 for iPhone
Blood Oxygen App screenshot #4 for iPhone
Blood Oxygen App screenshot #5 for iPhone
Blood Oxygen App screenshot #6 for iPhone
Blood Oxygen App screenshot #7 for iPhone
Blood Oxygen App screenshot #8 for iPhone
iphone
watch
🖼️Get Icon
Icons↘︎

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

See all reviews
+1

What's New in Blood Oxygen App

2.66

September 17, 2026

Bug fixes.

Subscription plans

Premium year

Blood oxygen stats, sync and more

$39.991 Year
How to cancel Blood Oxygen App subscription ⁉️

Charts

Top Grossing

📉 28-2

Medical

This app dropped -2 positions in Medical chart.

Last updated on September 18, 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

SCAM: DOES NOT MEASURE O2!!!!

RN REVIEW: I downloaded this app because it was supposed to be able to use my watch to measure my O2 saturation. I was immediately hit with an annual fee of $25. In order to use it, at all. Because it said it was compliant with the Apple Watch I bought it.
First, it doesn’t use my Apple Watch to measure, it uses my finger over both the flash and the camera at the same time which is not easy to do. And it doesn’t even measure my oxygen. It only measures my heart rate, then I have to do this weird tapping thing to measure my respiration rate. Then I have to ANDWER A QUIZ and then your oxygen level is fine based on your results OF THE QUIZ! As an RN I am flabbergasted that it thinks asking me if I am stressed can determine if I have a low oxygen level!!!
This is DANGEROUS!
Show more

Spot on

I like the app as it lets you know ahead of time to rest if your pushing to hard. Also it teaches you about other heart factors you should be aware of as well.

Oxygen

Still viewing

Great App

Easy to use

Where is my percentage number?

A paid app and you don't get a number on your pulse ox?

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.