# Blood Oxygen SpO₂ Tracker — Health Trends, Watch & Widgets

> Blood oxygen saturation (SpO₂) tracker with smart alerts and historical data. (iPhone/iPad app by Bernhard Hering.)

- Source: https://appshunter.io/ios/app/blood-oxygen-spo-tracker/id1533800269 (this page in markdown: same URL + `.md`)
- Developer: [Bernhard Hering](https://appshunter.io/developer/327542085)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases (on sale, was $1.99)
- Rating: 3.40/5 from 128 App Store ratings · 112 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, European Spanish
- Released: 2020-10-07
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/blood-oxygen-spo-tracker/id1533800269/reviews.md

## What is Blood Oxygen SpO₂ Tracker?

Blood Oxygen SpO₂ Tracker presents existing blood oxygen (SpO₂) readings from Apple Health on iPhone and Apple Watch. Review the latest available value, spot trends, and understand your history in a focused interface.

Features:
• Latest available SpO₂ reading on iPhone and Apple Watch
• History with daily values, 7-day averages, and min/max views
• iPhone widgets and Apple Watch face complications
• Optional notifications for readings below your chosen threshold
• Views for outliers and value distribution
• Barometric pressure and altitude context for personal interpretation

How it works:
The app requests read-only access to Blood Oxygen in Apple Health. To display values, compatible SpO₂ samples must already exist in Apple Health. Blood oxygen measurement availability depends on device and region.

Important:
The app does not measure SpO₂, is not a medical device, and does not diagnose, treat, cure, or prevent any condition. Information is for general wellness only and is not medical advice. Consult a qualified healthcare professional with health concerns.

Premium:
Some features require Premium, available through auto-renewable monthly or yearly subscriptions or a one-time lifetime purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel them in your Apple Account settings, and restore purchases in the app.

Privacy Policy: https://bernhardhering.de/privacy/
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- View latest SpO₂ measurement
- Detailed 7-day averages and charts
- Custom low reading notifications
- iOS and watchOS widgets/complications
- Elegant design with clear insights

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Yearly Subscription | $8.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Activate Full Access | $79.99 | one-time |


## What do users think of Blood Oxygen SpO₂ Tracker?

Overall sentiment: negative

**Pros**

- 🚀 Instant blood oxygen readings
- 👍 Helpful for high altitude regions
- 🔋 Efficient battery usage

**Cons**

- 🐛 Frequent crashes and freezes
- 🚫 Doesn't work with older Apple Watches
- 📱 Incompatible with certain iPhone models
- 💰 Overpriced for limited functionality

**Commonly reported bugs**

- Delayed alert notifications
- Inability to view previous readings
- Complication not working as expected

**Most requested features**

- PDF export of historical data
- Customizable alert thresholds
- Improved data visualization

## Recent user reviews (10 of 112)

All indexed reviews: https://appshunter.io/ios/app/blood-oxygen-spo-tracker/id1533800269/reviews.md

### 5/5 — Schneller Service

*2026-02-26*

Alles funktioniert wie beschrieben

### 1/5 — Trash App

*2025-08-27*

Not sure why Apple allows this in their App Store. Does not work as advertised on the iPhone or Apple Watch.

**Developer response:** Hi,
Did you Allow HealthKit Access to the app?

### 3/5 — Refund

*2025-08-18*

Please refund not syncing with my Apple Watch

### 1/5 — Funktioniert leider nicht

*2025-06-24*

Auf meiner Apple Watch Ultra 2 wird die App zwar gestartet, doch es erscheint nur ein schwarzer Bildschirm. In der Health-App wird angezeigt, dass die Blutsauerstoffapp nicht verfügbar ist.

**Developer response:** Hi,
Danke für das Feedback. Kannst du einmal vorher die iOS App starten bitte?
Und dann die Watch App. Die Berechtigungen für HealthKit sind manchmal nicht deterministisch.

### 1/5 — Enganação

*2024-12-27*

Um lixo de aplicativo

### 1/5 — Will not work

*2024-07-24, version 1.11*

This app does not work on my watch

### 3/5 — No pdf download

*2024-07-17*

Hello developer(s) I hope you are doing well. Can you please do an update for downloading .pdf and others so that I can show my doctors how bad my levels are. I know that they won’t accept it, but I’ll be able to cram my levels into my thick medical records.   Please, please. Thank you so much in advance. Have a wonderful day. 
Ps. I love the widget!!!

### 5/5 — Awesome!

*2024-03-15*

Finally have this info as a Apple Watch complication.

### 1/5 — Funktioniertauf dem iPhone SE auch unter iOS 17.3 überhaupt nicht

*2024-01-29*

Alle geforderten Einstellungen sind gemacht worden. - Sinnigerweise sind die Anweisungen für die Rückerstattung nicht dargestellt! - Ein Stern für die Bewertung ist eigentlich auch noch zuviel!

### 5/5 — Works Apple Watch series 9

*2023-12-30, version 1.11*

I wanted a blood oxygen “complication” and this app has given it too me.
Affordable price and does what Apple should but doesn’t! So thank you!

## Frequently asked questions about Blood Oxygen SpO₂ Tracker

### What does the Blood Oxygen SPO2 App do?

This app allows you to monitor your blood oxygen saturation (SpO₂) levels. It provides smart alerts for low readings, historical insights, and detailed charts to help you understand your overall wellness and make informed health decisions.

### What are the key features of this app?

Key features include viewing your latest SpO₂ measurement on your iPhone and Apple Watch, exploring detailed 7-day averages and daily min/max charts, setting custom thresholds for notifications, and utilizing widgets and complications for quick access to your data.

### How much does the Blood Oxygen SPO2 App cost?

The app is free to download and use, with the option for in-app purchases. Specific pricing for any premium features or unlocks would be detailed within the app itself.

### What are the compatibility requirements for this app?

The app is compatible with Apple Watch Series 6 or newer. It requires access to Apple Health to read blood oxygen data and supports iOS 17+ and watchOS 10+ for widgets and complications.

### Who is this app intended for?

This app is designed for individuals who want to track their blood oxygen levels to gain insights into their general wellness. It's particularly useful for users with an Apple Watch who want to integrate this vital sign monitoring into their health routine.

## Version history (last 5 releases)

### 2.5.7 — 2026-08-28

Additional values on Apple Watch now remain fully readable and are no longer clipped.

### 2.5.6 — 2026-08-20

Time-range controls and environmental details now reliably use the app’s language. Air-pressure and high-altitude information is localized correctly as well.

### 2.5.5 — 2026-08-13

Notifications now reliably use the app’s language on iPhone and Apple Watch.

### 2.5.4 — 2026-08-11

We improved stability, reliability, localization, and many details throughout the app.

### 2.5.3 — 2026-07-09

We improved stability, reliability, and small details throughout the app.

## Apps similar to Blood Oxygen SpO₂ Tracker

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [BloodOxygenMonitor](https://appshunter.io/ios/app/bloodoxygenmonitor/id6756411122) | — | Free | Health & Fitness |
| [Blood Ox](https://appshunter.io/ios/app/blood-ox/id6708240968) | 5.0 (1) | Free | Health & Fitness |
| [GPX Buddy](https://appshunter.io/ios/app/gpx-buddy/id1167744486) | 4.1 (28) | $2.99 | Health & Fitness |
| [DQS Mobile](https://appshunter.io/ios/app/dqs-mobile/id906923731) | 4.7 (167) | Free | Health & Fitness |
| [SPO2er: Blood Oxygen on Watch](https://appshunter.io/ios/app/spo2er-blood-oxygen-on-watch/id6755498703) | 4.8 (6) | $0.99 | Health & Fitness |
| [Watch Wrist Temp: Tracker](https://appshunter.io/ios/app/watch-wrist-temp-tracker/id6740745491) | 2.9 (16) | Free | Health & Fitness |

## More apps by Bernhard Hering

- [StepRace: Turn-Based Racing](https://appshunter.io/ios/app/steprace-turn-based-racing/id335141639)
- [Hanglage - Skimo Computer](https://appshunter.io/ios/app/hanglage-skimo-computer/id344104114)
- [7 Minute Guitar Workout](https://appshunter.io/ios/app/7-minute-guitar-workout/id1067271156)
- [Altimeter Elevation Watch](https://appshunter.io/ios/app/altimeter-elevation-watch/id1306145803)
- [HRV Watch: Stress & Recovery](https://appshunter.io/ios/app/hrv-watch-stress-and-recovery/id1368079276)
- [VO2 Max: Widget Notifications](https://appshunter.io/ios/app/vo2-max-widget-notifications/id1394840943)

All apps by Bernhard Hering: https://appshunter.io/developer/327542085

## Related topics

[blood oxygen spo2 tracker](https://appshunter.io/ios/topics/blood-oxygen-spo2-tracker) · [measure oxygen](https://appshunter.io/ios/topics/measure-oxygen) · [blood oxygen spo2 app](https://appshunter.io/ios/topics/blood-oxygen-spo2-app) · [sp02 monitor](https://appshunter.io/ios/topics/sp02-monitor) · [blood oxygen level pressure](https://appshunter.io/ios/topics/blood-oxygen-level-pressure) · [oxygen high fitness](https://appshunter.io/ios/topics/oxygen-high-fitness) · [spo2](https://appshunter.io/ios/topics/spo2)

---

*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 2026-08-29.*