# Master Anesthesia vs Anesthetize

The clearest difference is monetization model: Anesthetize at free with in-app purchases against Master Anesthesia's subscription. Anesthetize also leads on review sentiment (100% vs 78%). Master Anesthesia's advantage is ratings volume (2K vs 1) and update cadence (weekly vs monthly). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year and Anesthetize sells 2 in-app purchases, starting at $25.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Master Anesthesia against 5.0 for Anesthetize. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 78% of Master Anesthesia's written reviews are positive against 100% of Anesthetize's.

Master Anesthesia ships an update weekly, Anesthetize monthly. The most recent releases landed on October 25, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Master Anesthesia | Anesthetize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/anesthetize/id6753818182/reviews)** |
| Number of ratings | **2K** | 1 |
| Positive reviews | 78.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#194** | — |
| Size | 69 MB | 3 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Matthew Willis](https://appshunter.io/developer/1550793080) | [Anesthetize](https://appshunter.io/developer/1845159004) |

## What reviewers say

### Master Anesthesia

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

**Currently charting:** #194 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


### Anesthetize

[App page](https://appshunter.io/ios/app/anesthetize/id6753818182)

This AI-powered reference tool provides anesthesia professionals with quick, accurate answers to clinical questions. It offers structured summaries, textbook-validated responses, and exam preparation tools, designed for efficient OR workflows.

**Highlights:** Instant clinical answers, Textbook-validated responses, Student mode & exam prep, Save prompts and explanations, Domain-focused knowledge, Concise, practical answers

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Monthly | $25.99 | per month |
| Unlimited Yearly | $259.99 | per year |


## Frequently asked questions

### Is Master Anesthesia free?

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

### Is Anesthetize free?

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

### Which has better reviews, Master Anesthesia or Anesthetize?

Anesthetize is rated higher. Master Anesthesia averages 4.9 out of 5 from 2K ratings, while Anesthetize averages 5.0 from 1 ratings.

### Do Master Anesthesia or Anesthetize have ads?

Neither Master Anesthesia nor Anesthetize shows ads.

### Which is updated more often, Master Anesthesia or Anesthetize?

Master Anesthesia ships an update weekly, and Anesthetize monthly. Most recently, Master Anesthesia was updated on October 25, 2026 and Anesthetize on October 23, 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.*