Comparison

GasWork.com AA vs Master Anesthesia

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

GasWork.com AA

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
Read full description

Since 1996, GasWork.com has continued to be the go to place for AA jobs. AA = Anesthesiologist Assistants. Our free GasWork.com AA iPhone app continually mirrors the website so you can peruse Anesthesiologist Assistants opportunities which are constantly changing. After you have clicked on a post and seen the job details, that post is marked as, "Read", so you'll know what jobs you have already looked at. If you want to save a job post so you can find it again, you can swipe left to "Save." Alternatively, on the job details page you can click the hamburger menu icon (three bars) to see a "Save" button. That menu icon will also allow you to Share, Inquire By Email or possibly Inquire By Web. You can search all the jobs by State or Duration of Position (Full Time, Locum Tenens, etc).

About

Master Anesthesia

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
Currently charting
Read full description

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

Screenshots

GasWork.com AA4 screens
Master Anesthesia4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 6 level
GasWork.com AA versus Master Anesthesia: the parameters behind the verdict, then further details
ParameterGasWork.com AAMaster Anesthesia
PriceFreeFree
Rating5.0 (8 ratings) — better4.9 (2K ratings)
Positive reviews—78.3% of reviews
Number of ratings82K — better
Update frequencyEvery 44 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
Best chart rank—#197 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size6 MB69 MB
Age rating4+12+
DeveloperGasWork.com, Inc.Matthew Willis

Customer experience

GasWork.com AA

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Master Anesthesia

All ratings1,992 ratings
Positive97.7%
Neutral0.8%
Negative1.5%
Written reviews92 reviews
Positive78.3%
Neutral5.4%
Negative16.3%

Bugs and requests

GasWork.com AA

Not enough reviews yet to summarise bugs or requests.

Master Anesthesia

Reported bugs

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

Requested features

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

In-app purchases

None

GasWork.com AA

No in-app purchases

7 purchases

Master Anesthesia

Subscriptions2
  • Master Anesthesia Contributor7 Days trial$69.991 Year
  • Full Access CE7 Days trial$449.001 Year
One-time5
  • Module Unlock$24.99
  • Course Unlock$99.00
  • Master Anesthesia One Time$99.99
Show 2 more
  • One-Time$149.99
  • Course Unlock$449.00

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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