# Blood Oxygen

> Measure blood oxygen saturation levels directly from your Apple Watch. (iPhone/iPad app by Apple Inc..)

- Source: https://appshunter.io/ios/app/blood-oxygen/id1505627452 (this page in markdown: same URL + `.md`)
- Developer: [Apple Inc.](https://appshunter.io/developer/284417353)
- Category: Health & Fitness
- Price: Free
- Rating: 3.90/5 from 128 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: American English
- Released: 2020-09-16
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/blood-oxygen/id1505627452/reviews.md

## What is Blood Oxygen?

With the Blood Oxygen app on Apple Watch Series 6 or later*, you can measure the blood oxygen saturation levels directly from your wrist. Using the blood oxygen sensor on Apple Watch, the Blood Oxygen app can help you assess oxygen levels in your blood and get insights into how well your body is absorbing oxygen and overall wellness. 

Features

• Allows you to take on-demand blood oxygen measurements.

• Performs periodic background measurements throughout the day and overnight if you wear your Apple Watch to sleep.

• Stores all measurements in the Health app on iPhone, with the ability to filter and view measurements taken while asleep or in a high-elevation environment.

*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.

## Key features

- On-demand blood oxygen measurements
- Periodic background measurements
- Overnight measurements
- Stores measurements in Health app
- Filter measurements by sleep or elevation

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/blood-oxygen/id1505627452/reviews.md

### 1/5 — Why this app doesn’t work on Apple Watch serie 4

*2022-03-12, version 1.1*

Why

### 1/5 — Can’t get on my watch

*2022-03-07, version 1.1*

This is frustrating.  How do I get this on my watch?  I have followed all the instructions.

### 1/5 — Australia ability to use?

*2022-03-02, version 1.1*

Trying to download from Australia 
iPhone app says must download via Apple Watch 
Go to Apple Watch and click into the App Store to download and the App Store says must use iPhone 
So neither will download

### 1/5 — 18+

*2022-02-21, version 1.1*

Anyone with a watch should be able to access HEALTH features. Blood oxygen levels are not inappropriate for anyone to see.

### 1/5 — Cannot Download

*2022-02-09, version 1.1*

Can I download on my iPhone XR or my Apple Watch

### 1/5 — Why???

*2022-02-08, version 1.1*

I have an new apple SE watch and can’t have this app?!?! Make it available it could be really helpful for people who have asthma

### 3/5 — Needs a low oxy notification!!!!

*2022-01-27, version 1.1*

Major oversight? Why doesn’t this offer a low blood oxygen notification? Like how we get an AFIB or high heart rate notification if we have an Apple Watch? It would really help with COVID patients who are told they don’t need to go to the hospital until they reach a certain threshold.

### 5/5 — Oxygen

*2021-12-24, version 1.1*

It should have heart and pulse

### 1/5 — Can’t even download

*2021-12-24, version 1.1*

On my phone it says only available on watch for download; on my watch it says only available on the phone for download 🤦🏾‍♀️🤷🏾‍♀️

### 1/5 — Unavailable on series 6

*2021-12-13, version 1.1*

I saw it is unavailable on my watch which is series 6. No idea why although it is built in app. Tried to reset the watch and paired again but no chance to get it.

## Frequently asked questions about Blood Oxygen

### What does the Blood Oxygen app do?

The Blood Oxygen app allows you to measure your blood oxygen saturation levels directly from your Apple Watch Series 6 or later. It helps you assess how well your body is absorbing oxygen and provides insights into your overall wellness.

### How can I take a blood oxygen measurement?

You can take on-demand blood oxygen measurements directly from your wrist using the app. The app also performs periodic background measurements throughout the day and overnight if you wear your Apple Watch to sleep.

### Where are my blood oxygen measurements stored?

All your blood oxygen measurements are stored in the Health app on your iPhone. You can filter and view measurements taken while asleep or in a high-elevation environment.

### Is this app compatible with all Apple Watches?

This app is designed for Apple Watch Series 6 or later. For models purchased in the United States on or after January 18, 2024, with specific part numbers, the data analysis is performed on iPhone and results are viewed in the Health app.

## Version history (last 5 releases)

### 1.7 — 2025-12-12

Bug Fixes and Feature Enhancements

### 1.6 — 2025-09-15

Bug Fixes and Feature Enhancements

### 1.5 — 2024-09-16

Bug Fixes and Feature Enhancements

### 1.4 — 2024-01-22

Bug Fixes and Feature Enhancements

### 1.3 — 2023-09-18

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*