# Respiratory Notes vs RTB2

The clearest difference is rating: RTB2 at 5.0 against Respiratory Notes's 4.0. RTB2 also leads on ads (none vs shown) and update cadence (every 5 days vs every 6 months). Respiratory Notes's advantage is iOS requirement (13.0 vs 15.1). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. Respiratory Notes sells 1 in-app purchase, starting at $39.99 per year 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 4.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Respiratory Notes ships an update every 6 months, RTB2 every 5 days. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Respiratory Notes | RTB2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/respiratory-notes/id6569241898/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 47 MB | 46 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [Bbytetechworks LLC](https://appshunter.io/developer/1844731958) |

## What reviewers say

### Respiratory Notes

[App page](https://appshunter.io/ios/app/respiratory-notes/id6569241898)

This app provides a comprehensive, procedure-based reference for respiratory therapy information. It includes illustrations, forms, and algorithms to aid in study and practice, with content organized around protocols and new pulmonary disease tabs. An in-app purchase unlocks all content, and a subscription offers continuous updates.

**Highlights:** Procedure-based format, Supporting illustrations and tables, Fill-in-the-blank forms, Algorithms based on AARC Guidelines, SmartSearch technology, Offline content access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Respiratory Notes | $39.99 | per year |


### 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 Notes free?

Respiratory Notes 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 Notes or RTB2?

RTB2 is rated higher. Respiratory Notes averages 4.0 out of 5 from 4 ratings, while RTB2 averages 5.0 from 2 ratings.

### Do Respiratory Notes or RTB2 have ads?

Respiratory Notes shows ads; RTB2 does not.

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

Respiratory Notes ships an update every 6 months, and RTB2 every 5 days. Most recently, Respiratory Notes was updated on September 30, 2026 and RTB2 on September 26, 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.*