# EchoRef vs F&P ROX Vector

The clearest difference is update cadence: EchoRef at every 2 months against F&P ROX Vector's every 17 months. EchoRef also leads on ratings volume (1.4K vs 1). F&P ROX Vector's advantage is iOS requirement (11.0 vs 26.0). On price, rating, ads and in-app purchases 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 — 4.9 for EchoRef against 5.0 for F&P ROX Vector. That said, the two scores are not equally well evidenced: EchoRef has 1.4K ratings behind it against 1, so its average is the more settled of the two.

EchoRef ships an update every 2 months, F&P ROX Vector every 17 months. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | EchoRef | F&P ROX Vector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (1.4K ratings)](https://appshunter.io/ios/app/echoref/id1434016053/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/f-and-p-rox-vector/id1512745548/reviews)** |
| Number of ratings | **1.4K** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 17 months |
| Monetization | Free | Free |
| Size | 104 MB | 28 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Rishi Kumar](https://appshunter.io/developer/1434016052) | [Fisher & Paykel Healthcare Limited](https://appshunter.io/developer/634784377) |

## What reviewers say

### EchoRef

[App page](https://appshunter.io/ios/app/echoref/id1434016053)

This educational reference app provides comprehensive information on point-of-care ultrasound (POCUS), echocardiography, and cardiac measurements. It includes lessons on interventional procedures and hemodynamic calculations for medical professionals.

**Highlights:** Point-of-care ultrasound (POCUS), Transthoracic echocardiography (TTE), Transesophageal echocardiography (TEE), Cardiac dimensions and valve measurements, Hemodynamic and ultrasound calculations, Interventional procedure lessons

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

**In-app purchases:** none


### F&P ROX Vector

[App page](https://appshunter.io/ios/app/f-and-p-rox-vector/id1512745548)

This app visualizes respiratory rate and oxygen delivery changes in vector form. It calculates the ROX index to predict the success of nasal high flow therapy for hypoxemic respiratory failure. The tool also serves as a simulation for clinical scenarios and allows data export.

**Highlights:** Visualize respiratory rate and oxygen changes, Calculate ROX index, Predict nasal high flow therapy success, Clinical scenario simulation, Export data in xlsx format

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

**In-app purchases:** none


## Frequently asked questions

### Is EchoRef free?

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

### Is F&P ROX Vector free?

F&P ROX Vector is free to download, with no in-app purchases.

### Which has better reviews, EchoRef or F&P ROX Vector?

F&P ROX Vector is rated higher. EchoRef averages 4.9 out of 5 from 1.4K ratings, while F&P ROX Vector averages 5.0 from 1 ratings.

### Do EchoRef or F&P ROX Vector have ads?

Neither EchoRef nor F&P ROX Vector shows ads.

### Which is updated more often, EchoRef or F&P ROX Vector?

EchoRef ships an update every 2 months, and F&P ROX Vector every 17 months. Most recently, EchoRef was updated on October 25, 2026 and F&P ROX Vector on October 9, 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.*