# Blood Oxygen \| O2 Monitor app+ — user reviews

> 16 indexed App Store user reviews of Blood Oxygen | O2 Monitor app+ by Yana Shestakova, rated 4.60/5 from 423 ratings.

- Source: https://appshunter.io/ios/app/blood-oxygen-o2-monitor-app-plus/id1567177708/reviews
- App overview in markdown: https://appshunter.io/ios/app/blood-oxygen-o2-monitor-app-plus/id1567177708.md
- Rating breakdown: 5★ 338 · 4★ 42 · 3★ 14 · 2★ 5 · 1★ 24

## Newest reviews (4 of 16)

### 1/5 — Adds little value. Just a manual log. That's it

*2024-03-25*

It just does 3 things:

1. pulls your oxygen and heart rate data from apple health and shows it to you (which you can already do in apple health)

2. Allows you to manually type in heart rate and oxygen data (which you can already do in apple health)

3 allows you to measure heartbeat using the iPhone camera app (which other apps do for free)

So in sum. This is a total waste of storage space and no value to me. And it's a $10 subscription! Geez

### 1/5 — No sirve el oximetro

*2023-07-27, version 1.1.9*

Me estafo fin

### 1/5 — ？

*2023-04-18*

ダウンロードしたら課税金発生
課税金があるのなら書いてほしい
無料ではない。

### 1/5 — O2 tester

*2022-05-08*

Very hard to understand how to measure blood oxygen levels. There’s not a test button for you to press. Sorry that I even bothered to download.

**Developer response:** This app can't offer you the function of measuring, cause technically it's impossible now. But we do our best to add it in future.

## Most critical reviews (10 lowest-rated)

### 1/5 — Garbage

*2026-07-23*

This is a notebook application, you do not measure anything, including on Apple Watch, you enter the data itself and this data is stored as in a notebook. How did it get a 4.6 rating? Delete.

### 1/5 — Meter app

*2026-03-19*

This is a scam does measure oxygen and won’t let you cancel during free trial

### 1/5 — Can’t delete

*2025-08-26*

I downloaded this because I thought it would work with my watch, but it’s actually for a device, I can’t delete it, I’ve deleted it five or six times from my phone and it still keeps coming back.

### 1/5 — Waste of time

*2025-06-28*

Does not measure O2 saturation.

### 1/5 — No brinda instrucciones de uso ni compatibilidad con la versión correcta de Apple Watch

*2025-06-09, version 1.2.4*

No es compatible con mi Apple Watch y no lo avisa en la aplicación. No te ofrece un manual de uso ni tutorial para iniciar. No le entiendo a la app.

### 1/5 — Misleading

*2025-04-20*

Subscription service

### 1/5 — Inaccurate

*2024-11-11*

The app isn’t accurate at all. The subscription is a scam because you can’t try the app before paying.

I verified the results of the pulse with a known good device. The app was off by 20 BPM.

The description leads you to believe that it reads the O2. It doesn’t.

### 1/5 — Refund money please

*2024-09-23*

This doesn’t take your blood oxygen I would like my money back. I’m very disappointed.

### 1/5 — Does not work

*2024-09-04*

This does not work it will not give you a current oxygen reading

### 1/5 — More Readings

*2024-04-08*

It would be nice if it would read blood oxygen as well

## Most praised reviews (2 highest-rated)

### 5/5 — Wow!

*2025-07-08*

Wow

### 2/5 — How do I measure my blood oxygen?

*2024-02-12*

Please tell me if I need to get or buy a blood oxygen test kit or can I measure it this way I have no idea .help me please?thanks

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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 2026-09-08.*