# ROX Index vs VentRef

The clearest difference is ratings volume: VentRef at 44 against ROX Index's 1. ROX Index's advantage is iOS requirement (11.0 vs 26.0). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for ROX Index against 5.0 for VentRef. That said, the two scores are not equally well evidenced: VentRef has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | ROX Index | VentRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/rox-index/id1582208777/reviews) | [5.0 (44 ratings)](https://appshunter.io/ios/app/ventref/id6756503414/reviews) |
| Number of ratings | 1 | **44** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 10 MB | 27 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Satish Deopujari](https://appshunter.io/developer/1180072702) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### 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


### VentRef

[App page](https://appshunter.io/ios/app/ventref/id6756503414)

A clinical reference tool for healthcare professionals managing mechanical ventilation and oxygen therapy. It provides information grounded in respiratory physiology and evidence-based critical care.

**Highlights:** Mechanical ventilation reference, Oxygen therapy reference, Respiratory physiology, Evidence-based critical care, Clinical decision support

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

**In-app purchases:** none


## Frequently asked questions

### Is ROX Index free?

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

### Is VentRef free?

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

### Which has better reviews, ROX Index or VentRef?

ROX Index and VentRef are both rated 5.0 out of 5 on the App Store, from 1 and 44 ratings respectively.

### Do ROX Index or VentRef have ads?

Neither ROX Index nor VentRef shows ads.

### Which is updated more often, ROX Index or VentRef?

ROX Index ships an update every 3 weeks, and VentRef every 3 weeks. Most recently, ROX Index was updated on October 30, 2026 and VentRef on October 28, 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.*