# GasWork.com CRNA vs Master Anesthesia

The clearest difference is rating: Master Anesthesia at 4.9 against GasWork.com CRNA's 4.4. Master Anesthesia also leads on update cadence (weekly vs every 6 months) and review sentiment (78% vs 50%). GasWork.com CRNA's advantage is in-app purchases (none vs 7) and iOS requirement (10.0 vs 15.1). On price, 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 CRNA asks for nothing beyond the download.

Master Anesthesia holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 50% of GasWork.com CRNA's written reviews are positive against 78% of Master Anesthesia's.

GasWork.com CRNA ships an update every 6 months, Master Anesthesia weekly. The most recent releases landed on September 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | GasWork.com CRNA | Master Anesthesia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (12 ratings)](https://appshunter.io/ios/app/gasworkcom-crna/id1439892593/reviews) | **[4.9 (2K ratings)](https://appshunter.io/ios/app/master-anesthesia/id1550793078/reviews)** |
| Number of ratings | 12 | **2K** |
| Positive reviews | 50.0% of reviews | **78.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Best chart rank | — | **#171** |
| Size | 38 MB | 69 MB |
| Requires iOS | **10.0** | 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 CRNA

[App page](https://appshunter.io/ios/app/gasworkcom-crna/id1439892593)

This app connects Certified Registered Nurse Anesthetists with thousands of job opportunities nationwide. Easily search by state or position type, mark jobs as read, and save favorites for later review. Inquire directly about positions via email or web.

**Highlights:** Thousands of CRNA job listings, Search by state and position duration, Mark jobs as read, Save job posts, Inquire by email or web, Mirrors website content

**In-app purchases:** none


### Master Anesthesia

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

**Currently charting:** #171 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 CRNA free?

GasWork.com CRNA 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 CRNA or Master Anesthesia?

Master Anesthesia is rated higher. GasWork.com CRNA averages 4.4 out of 5 from 12 ratings, while Master Anesthesia averages 4.9 from 2K ratings.

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

Neither GasWork.com CRNA nor Master Anesthesia shows ads.

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

GasWork.com CRNA ships an update every 6 months, and Master Anesthesia weekly. Most recently, GasWork.com CRNA was updated on September 25, 2026 and Master Anesthesia on October 18, 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.*