# AIRVO 2 vs ROX Index

The clearest difference is update cadence: ROX Index at every 3 weeks against AIRVO 2's every 13 months. ROX Index also leads on rating (5.0 vs 4.6) and review sentiment (100% vs 75%). AIRVO 2's advantage is ratings volume (8 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ROX Index holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: AIRVO 2 has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of AIRVO 2's written reviews are positive against 100% of ROX Index's.

AIRVO 2 ships an update every 13 months, ROX Index every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | AIRVO 2 | ROX Index |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (8 ratings)](https://appshunter.io/ios/app/airvo-2/id734808115/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rox-index/id1582208777/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 61 MB | 10 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Fisher & Paykel Healthcare Limited](https://appshunter.io/developer/634784377) | [Satish Deopujari](https://appshunter.io/developer/1180072702) |

## What reviewers say

### AIRVO 2

[App page](https://appshunter.io/ios/app/airvo-2/id734808115)

This app simulates the user interface of a medical device, allowing users to learn its functions. Explore settings, oxygen levels, and simulated warnings through interactive tutorials and video clips. It serves as a training tool and does not control the actual device.

**Highlights:** Simulated user interface, Adjustable settings, Oxygen level simulation, Warning simulations, Interactive tutorials, Video guides

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

**In-app purchases:** none


### ROX Index

[App page](https://appshunter.io/ios/app/rox-index/id1582208777)

This medical app assists doctors and students in calculating the ROX index, a tool to predict the success or failure of High-Flow Nasal Cannula (HFNC) therapy, primarily studied in pneumonia patients. It simplifies the calculation using SpO2, FiO2, and Respiratory Rate.

**Highlights:** ROX index calculation, Predicts HFNC success/failure, Primarily for pneumonia patients, Uses SpO2, FiO2, and RR, Assists doctors and medical students

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AIRVO 2 free?

AIRVO 2 is free to download, with no in-app purchases.

### Is ROX Index free?

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

### Which has better reviews, AIRVO 2 or ROX Index?

ROX Index is rated higher. AIRVO 2 averages 4.6 out of 5 from 8 ratings, while ROX Index averages 5.0 from 1 ratings.

### Do AIRVO 2 or ROX Index have ads?

Neither AIRVO 2 nor ROX Index shows ads.

### Which is updated more often, AIRVO 2 or ROX Index?

AIRVO 2 ships an update every 13 months, and ROX Index every 3 weeks. Most recently, AIRVO 2 was updated on November 1, 2026 and ROX Index on November 3, 2026.

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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.*