# Master Anesthesia

> Anesthesia clinical decision support tool for disease, drug, and surgical implications. (iPhone/iPad app by Matthew Willis.)

- Source: https://appshunter.io/ios/app/master-anesthesia/id1550793078 (this page in markdown: same URL + `.md`)
- Developer: [Matthew Willis](https://appshunter.io/developer/1550793080)
- Category: Medical
- Price: Free with in-app purchases
- Rating: 4.90/5 from 1,969 App Store ratings · 90 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.1 · 68 MB
- Languages: American English
- Released: 2021-01-28
- Data updated: 2026-08-28
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews.md

## What is Master Anesthesia?

Master Anesthesia helps anesthesia professionals find answers quickly to common questions. The primary purpose is to provide clinicians with the highlighted anesthetic implications of specific diseases, surgical cases, and drugs. In addition, a searchable list of over 1,000 acronyms is provided. A calculator has also been created to assist with maximum local anesthetic dosage, estimated blood volume, maximum allowable blood loss, fluid calculations, equipment, vitals, and more.

Subscription and Purchase Options:

Clinical Access Pro: $69.99/year – Full access to all clinical tools and updates. Auto-renews yearly.
Full Access CE: $449.99/year – Full access to Clinical Access Pro + everything CRNAs need for their 4-year cycle.  More than 150 pre-approved Class A (Mac-Ed) credits, and over 100 courses to choose from.

Payment & Renewal:
Payment will be charged to your Apple ID account at the time of confirmation.
Annual subscriptions automatically renew unless canceled at least 24 hours before the end of the current billing period.
You can manage or cancel your subscription anytime in your Apple ID account settings.
For more details on managing subscriptions, visit: https://support.apple.com/en-us/118428

Website: https://masteranesthesia.com
Terms of Use: https://masteranesthesia.com/terms-of-service
Privacy Policy: https://masteranesthesia.com/privacy-policy-and-disclaimer

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Master Anesthesia Contributor | $69.99 | per year |
| Full Access CE | $449.00 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Master Anesthesia One Time | $99.99 | one-time |
| Course Unlock | $449.00 | one-time |
| Course Unlock | $99.00 | one-time |
| Module Unlock | $24.99 | one-time |
| One-Time | $149.99 | one-time |


## Chart rankings

- #124 in Top Grossing · Medical (US App Store)

## What do users think of Master Anesthesia?

Overall sentiment: positive

**Pros**

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

**Cons**

- 🐛 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

**Commonly reported bugs**

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

**Most requested features**

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

## Recent user reviews (10 of 90)

All indexed reviews: https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews.md

### 5/5 — Exceptional

*2026-08-02, version 3.1.1*

By far the best companion app for anyone in the anaesthesia field.

### 5/5 — Improving all the time

*2026-07-31, version 3.0.9*

I’ve been using MA for at least 5 or so years. It’s a great app and each update is an amazing improvement. I recommend this app to colleagues all the time. It’s easy to navigate and easy to read especially in the OR. Keep up the great work!

### 5/5 — The best anesthesia resource

*2026-03-25, version 2.57*

Love this app so much for my anesthesia practice. Easy to use, comprehensive, relevant information that’s actually useful for everyday practice. Worth every penny

### 5/5 — RRNA

*2026-02-02, version 2.54*

Great tool! Easy to use! Currently using for insight to foreign procedures, developing anesthetic plan, dosing, and weights. Highly recommend.

### 5/5 — AAA app

*2025-08-27, version 2.45*

A must have application in your anesthesia library. I love the clean interface of the calculators.

### 5/5 — Calculator

*2025-08-25, version 2.43*

Why has the calculator not been working? The app has been shutting down every time I try to access it on both phone and iPad. It’s also not available on the website.

### 3/5 — Crashing

*2025-08-20, version 2.43*

It was great until recently. App crashes in the calculations section.

### 1/5 — Crash city

*2025-08-12, version 2.43*

I can’t even use the calculator it just crashes every time. 2 updates later and ITS STILL A PROBLEM. Come on guys get it together

### 5/5 — Great

*2025-07-22, version 2.40*

One of the reasons I bought the continuing education package was that it is usable in the app. It’s much more user friendly to do it this way than logging in to APEX in a browser on my phone, which is what I did when studying for boards and not in front of my laptop. Accessing the material is simple and the lessons are concise and to the point. Would highly recommend to anyone in the field

### 5/5 — Impressive App!

*2025-07-21, version 2.40*

Overall, the user interface is intuitive and makes it easy to rapidly access information. I am just getting started with my anesthesia education and I look forward to using the app in clinical practice.

## Frequently asked questions about Master Anesthesia

### What does the Master Anesthesia app do?

This app is designed to help anesthesia professionals quickly find answers to common clinical questions. It provides information on the anesthetic implications of various diseases, surgical cases, and drugs. It also includes a comprehensive calculator for managing dosages, fluid balance, and other critical metrics.

### What are the key features of Master Anesthesia?

Key features include detailed anesthetic implications for diseases, surgical scenarios, and medications. It also offers a searchable database of over 1,000 acronyms. A robust calculator assists with maximum local anesthetic dosage, estimated blood volume, maximum allowable blood loss, fluid calculations, equipment needs, and vital signs.

### How much does Master Anesthesia cost?

The app offers two purchase options: Annual Access for $49.99 per year, which auto-renews, or Lifetime Access for a one-time purchase of $149.99. Both options provide full access to features and updates.

### Is Master Anesthesia compatible with my device?

Payment and subscription management are handled through your Apple ID account settings. While specific device compatibility isn't detailed, it is available on the Apple platform. You can manage or cancel your subscription anytime within your Apple ID account settings.

### Who would benefit from using Master Anesthesia?

This app is specifically tailored for anesthesia professionals, including anesthesiologists, nurse anesthetists, and residents. It is ideal for those who need rapid access to critical information and calculation tools during patient care or for study.

## Version history (last 5 releases)

### 3.1.3 — 2026-08-19

New: PONV Risk (Apfel Score) calculator - tap the risk factors that apply and get an instant 0-4 risk score with tailored antiemetic prophylaxis guidance. Free for all users.

### 3.1.2 — 2026-08-11

• Fixed a flicker in the header/nav bar on slow scroll-ups
• Cardioversion joule doses updated to the 2025 AHA guidance
• Search: see all results with a new expand/collapse arrow, and fewer irrelevant matches
• Fixed two spots in CE lessons where content could get stuck behind the keyboard or bottom bar

### 3.1.1 — 2026-08-01

Fixed a crash that could close the app shortly after opening.

The navigation bar is smoother — no bounce, no getting stuck on the wrong colour — and Menu is now Index, with a cleaner layout that follows your light/dark setting.

Lesson tables now render as real tables instead of stacked lines, and lesson lists show which module they're from.

### 3.0.9 — 2026-07-13

What's new in 3.0.9
• Cancel or Proceed — a new guided clinical reference giving a clear cancel, postpone, or proceed recommendation for a case, from current perioperative guidelines. Now covers drug screens, substance use, and elevated BMI — free for everyone this release.
• Library posts auto-link the drugs, surgeries, and conditions they mention — tap to open — and tap any clinical acronym for an instant definition.
• Faster Education tab and smoother CE.

### 3.0.8 — 2026-07-09

What's new in 3.0.8
• Expanded dosing references — many more medications now included (vasopressors, inotropes, methohexital, heparin, antibiotics and more) with evidence-reviewed guidance, available offline
• Weight-based dosing references now on every drug page
• The Local Anesthetic Toxicity reference now lets you choose the body-weight basis — ideal, lean, or actual
• Jump-to section index and reference links on drug, surgery, and condition pages

## Apps similar to Master Anesthesia

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Vargo Anesthesia Mega App](https://appshunter.io/ios/app/vargo-anesthesia-mega-app/id791467318) | 4.7 (173) | $99.99 | Medical |
| [Coexisting Diseases & Surgery](https://appshunter.io/ios/app/coexisting-diseases-and-surgery/id1543711877) | 4.6 (29) | $99.99 | Medical |
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| [Nurse Anesthesia Pocket Guide](https://appshunter.io/ios/app/nurse-anesthesia-pocket-guide/id1298506239) | 4.7 (79) | Free | Medical |
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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*