# Respiratory Diseases vs VentRef

The clearest difference is review sentiment: VentRef at 100% against Respiratory Diseases's 0%. VentRef also leads on rating (5.0 vs 1.0) and in-app purchases (none vs 5). Respiratory Diseases's advantage is iOS requirement (9.3 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Respiratory Diseases sells 5 one-off in-app purchases. VentRef asks for nothing beyond the download.

VentRef holds the better App Store score, 5.0 against 1.0. 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 point the same way: 0% of Respiratory Diseases's written reviews are positive against 100% of VentRef's.

Respiratory Diseases ships an update every 24 months, VentRef every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Respiratory Diseases | VentRef |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/respiratory-diseases/id1179359867/reviews) | **[5.0 (44 ratings)](https://appshunter.io/ios/app/ventref/id6756503414/reviews)** |
| Number of ratings | 1 | **44** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 43 MB | 27 MB |
| Requires iOS | **9.3** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Focus Medica](https://appshunter.io/developer/508294531) | [Rishi Kumar](https://appshunter.io/developer/1434016052) |

## What reviewers say

### Respiratory Diseases

[App page](https://appshunter.io/ios/app/respiratory-diseases/id1179359867)

Explore animated explanations of respiratory diseases, covering anatomy, function, causes, symptoms, diagnosis, and treatment. Understand the immunopathology and therapies for various conditions affecting the respiratory system.

**Highlights:** Animated explanations, Respiratory system anatomy, Disease immunopathology, Causes and symptoms, Diagnosis and complications, Treatment therapies and procedures

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Allergic rhinitis | $7.99 | one-time |
| Chronic Asthma | $7.99 | one-time |
| Chronic Obstructive Pulmonary Disease (COPD) | $7.99 | one-time |
| Upper Respiratory Tract Infections (URTI) | $7.99 | one-time |
| Respiratory Diseases - Buy all | $19.99 | one-time |


### 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 Respiratory Diseases free?

Respiratory Diseases is free to download, with in-app purchases available.

### Is VentRef free?

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

### Which has better reviews, Respiratory Diseases or VentRef?

VentRef is rated higher. Respiratory Diseases averages 1.0 out of 5 from 1 ratings, while VentRef averages 5.0 from 44 ratings.

### Do Respiratory Diseases or VentRef have ads?

Neither Respiratory Diseases nor VentRef shows ads.

### Which is updated more often, Respiratory Diseases or VentRef?

Respiratory Diseases ships an update every 24 months, and VentRef every 3 weeks. Most recently, Respiratory Diseases was updated on October 24, 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.*