# GasWork.com AA vs Master Anesthesia

The clearest difference is in-app purchases: GasWork.com AA at none against Master Anesthesia's 7. Master Anesthesia's advantage is update cadence (weekly vs every 44 months) and ratings volume (2K vs 8). On price, rating, ads 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. GasWork.com AA asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for GasWork.com AA against 4.9 for Master Anesthesia. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 8, so its average is the more settled of the two.

GasWork.com AA ships an update every 44 months, Master Anesthesia weekly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | GasWork.com AA | Master Anesthesia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/gasworkcom-aa/id1439892338/reviews)** | [4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews) |
| Number of ratings | 8 | **2K** |
| Positive reviews | — | 78.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 44 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Best chart rank | — | **#197** |
| Size | 6 MB | 69 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [GasWork.com, Inc.](https://appshunter.io/developer/1161352848) | [Matthew Willis](https://appshunter.io/developer/1550793080) |

## What reviewers say

### GasWork.com AA

[App page](https://appshunter.io/ios/app/gasworkcom-aa/id1439892338)

This app connects Anesthesiologist Assistants with job opportunities. It mirrors the website's listings, allowing users to view, mark as read, and save job posts. Users can also search by state or position duration and inquire about roles.

**Highlights:** View Anesthesiologist Assistant job opportunities, Mark jobs as read, Save job posts for later, Search jobs by state, Search jobs by position duration, Inquire about jobs via email or web

**Features:** macOS Compatibility

**In-app purchases:** none


### Master Anesthesia

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

**Currently charting:** #197 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


## Frequently asked questions

### Is GasWork.com AA free?

GasWork.com AA is free to download, with no in-app purchases.

### Is Master Anesthesia free?

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

### Which has better reviews, GasWork.com AA or Master Anesthesia?

GasWork.com AA is rated higher. GasWork.com AA averages 5.0 out of 5 from 8 ratings, while Master Anesthesia averages 4.9 from 2K ratings.

### Do GasWork.com AA or Master Anesthesia have ads?

Neither GasWork.com AA nor Master Anesthesia shows ads.

### Which is updated more often, GasWork.com AA or Master Anesthesia?

GasWork.com AA ships an update every 44 months, and Master Anesthesia weekly. Most recently, GasWork.com AA was updated on October 12, 2026 and Master Anesthesia on October 13, 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.*