# Respiratory Diseases vs RTB2

The clearest difference is review sentiment: RTB2 at 100% against Respiratory Diseases's 0%. RTB2 also leads on rating (5.0 vs 1.0) and update cadence (every 5 days vs every 24 months). Respiratory Diseases's advantage is iOS requirement (9.3 vs 15.1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Respiratory Diseases sells 5 one-off in-app purchases and RTB2 sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

RTB2 holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Respiratory Diseases's written reviews are positive against 100% of RTB2's.

Respiratory Diseases ships an update every 24 months, RTB2 every 5 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Respiratory Diseases | RTB2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/respiratory-diseases/id1179359867/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 43 MB | 46 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Focus Medica](https://appshunter.io/developer/508294531) | [Bbytetechworks LLC](https://appshunter.io/developer/1844731958) |

## 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 |


### RTB2

[App page](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847)

This medical reference app provides respiratory therapists and students with essential clinical tools. It features ventilator mode guides, therapy calculators, and oxygen guidance in a clean, organized format for quick access in critical care settings.

**Highlights:** Ventilator mode reference guides, Respiratory therapy clinical calculators, Oxygen device guidance, Structured respiratory care information, Fast clinical review format, Advanced calculators (Pro)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RTB2 Pro | $2.99 | per month |


## Frequently asked questions

### Is Respiratory Diseases free?

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

### Is RTB2 free?

RTB2 is free to download, with in-app purchases available.

### Which has better reviews, Respiratory Diseases or RTB2?

RTB2 is rated higher. Respiratory Diseases averages 1.0 out of 5 from 1 ratings, while RTB2 averages 5.0 from 2 ratings.

### Do Respiratory Diseases or RTB2 have ads?

Neither Respiratory Diseases nor RTB2 shows ads.

### Which is updated more often, Respiratory Diseases or RTB2?

Respiratory Diseases ships an update every 24 months, and RTB2 every 5 days. Most recently, Respiratory Diseases was updated on October 24, 2026 and RTB2 on October 12, 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.*