# Blood Oxygen App vs R

The clearest difference is in-app purchases: R at none against Blood Oxygen App's 14. Blood Oxygen App's advantage is chart position (#33 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Blood Oxygen App sells 10 in-app purchases, starting at $2.99 per 7 days. R asks for nothing beyond the download.

## The numbers

| Metric | Blood Oxygen App | R |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (31K ratings)](https://appshunter.io/ios/app/blood-oxygen-app/id1541992656/reviews)** | — |
| Number of ratings | **31K** | — |
| Positive reviews | 25.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Freemium | — |
| Best chart rank | **#33** | — |
| Size | 316 MB | 19 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [AboutMe Apps, Inc.](https://appshunter.io/developer/1088980079) | [Mario Rosario](https://appshunter.io/developer/6776392929) |

## What reviewers say

### Blood Oxygen App

[App page](https://appshunter.io/ios/app/blood-oxygen-app/id1541992656)

**Currently charting:** #33 Top Grossing · Medical (US App Store)

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.

**Highlights:** Blood oxygen monitoring, Heart rate estimation via camera, Apple Watch sync, Data logging and export (PDF), Box breathing exercises, Sleep reports

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium features set | $2.99 | per 7 days |
| Pulse oximeter for Apple Watch | $9.99 | per month |
| Premium month | $9.99 | per month |
| Premium month | $12.99 | per month |
| Premium features (all) | $19.99 | per year |
| Premium | $19.99 | per year |
| Premium features set | $24.99 | per year |
| Premium features set | $24.99 | per year |
| Blood Oxygen＋Body Temperature | $29.99 | per year |
| Premium year | $39.99 | per year |

**What reviewers like**

- ⭐ Awesome app
- ⭐ Very easy to use
- ⭐ Helpful for monitoring health conditions
- ⭐ Detailed data logging

**What reviewers complain about**

- ❌ Doesn't accurately measure blood oxygen levels
- ❌ Requires premium subscription for key features
- ❌ Inconsistent and unreliable performance
- ❌ Deceptive marketing and false advertising
- ❌ No way to contact customer support

**Reported bugs**

- App crashes and freezes frequently
- Inaccurate heart rate and oxygen level readings
- Compatibility issues with certain Apple Watch models

**Requested features**

- Add audible/vibration alerts for low oxygen levels
- Improve automatic oxygen level monitoring
- Provide more control over reading frequency


### R

[App page](https://appshunter.io/ios/app/r-plus/id6776392439)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Blood Oxygen App free?

Blood Oxygen App is free to download, with in-app purchases available.

### Is R free?

R is free to download, with no in-app purchases.

### Do Blood Oxygen App or R have ads?

Neither Blood Oxygen App nor R shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*