# Master Anesthesia vs Respiratory Notes

The clearest difference is rating: Master Anesthesia at 4.9 against Respiratory Notes's 4.0. Master Anesthesia also leads on ads (none vs shown) and update cadence (every 6 days vs every 6 months). Respiratory Notes's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year and Respiratory Notes sells 1 in-app purchase, starting at $39.99 per year. Whichever you choose, the download price is not the number that matters.

Master Anesthesia holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 4, so its average is the more settled of the two.

Master Anesthesia ships an update every 6 days, Respiratory Notes every 6 months. The most recent releases landed on September 22, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | Master Anesthesia | Respiratory Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/respiratory-notes/id6569241898/reviews) |
| Number of ratings | **2K** | 4 |
| Positive reviews | 79.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 6 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#94** | — |
| Size | 69 MB | 47 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Matthew Willis](https://appshunter.io/developer/1550793080) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### Master Anesthesia

[App page](https://appshunter.io/ios/app/master-anesthesia/id1550793078)

**Currently charting:** #94 Top Grossing · Medical (US App Store)

This app provides anesthesia professionals with quick answers to common questions. It highlights anesthetic implications of diseases, surgical cases, and drugs, and includes a searchable acronym list and a comprehensive calculator for dosages, blood loss, and fluid management.

**Highlights:** Disease anesthetic implications, Surgical case anesthetic implications, Drug anesthetic implications, Searchable acronym list, Local anesthetic dosage calculator, Blood volume and loss calculator, Fluid and equipment calculations

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Master Anesthesia Contributor | $69.99 | per year |
| Full Access CE | $449.00 | per year |
| Module Unlock | $24.99 | one-time |
| Course Unlock | $99.00 | one-time |
| Master Anesthesia One Time | $99.99 | one-time |
| One-Time | $149.99 | one-time |
| Course Unlock | $449.00 | one-time |

**What reviewers like**

- 👍 Intuitive and user-friendly interface
- 🚀 Efficient and fast calculators
- 📚 Comprehensive information and resources
- 💡 Helpful for clinical practice and preparation
- 🔍 Useful reference for anesthesia providers

**What reviewers complain about**

- 🐛 Frequent crashes and freezes in the calculations section
- 🔒 Issues with purchase verification and login
- 💰 Concerns about the transition to a paid subscription model
- 🔋 High battery consumption and performance issues on older devices

**Reported bugs**

- Incorrect terminology and credentials on the starting screen
- Inconsistent behavior when accessing content after subscription changes

**Requested features**

- Offline access to content
- Apple Watch integration for the calculator
- More detailed and up-to-date information on procedures and conditions


### 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 |


## Frequently asked questions

### Is Master Anesthesia free?

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

### Is Respiratory Notes free?

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

### Which has better reviews, Master Anesthesia or Respiratory Notes?

Master Anesthesia is rated higher. Master Anesthesia averages 4.9 out of 5 from 2K ratings, while Respiratory Notes averages 4.0 from 4 ratings.

### Do Master Anesthesia or Respiratory Notes have ads?

Respiratory Notes shows ads; Master Anesthesia does not.

### Which is updated more often, Master Anesthesia or Respiratory Notes?

Master Anesthesia ships an update every 6 days, and Respiratory Notes every 6 months. Most recently, Master Anesthesia was updated on September 22, 2026 and Respiratory Notes on August 19, 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.*