Comparison

Master Anesthesia vs Periop Pacemaker

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

Head to head
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

About

Periop Pacemaker

This app provides medical professionals with a decision algorithm for managing surgical patients with implantable defibrillators or pacemakers. It is based on guidelines endorsed by the Heart Rhythm Society and updated annually by an expert committee.

Highlights
  • Decision algorithm for pacemaker/defibrillator management
  • Endorsed by Heart Rhythm Society
  • Based on ASA Perioperative Cardiac Implantable Electronic Device Management Aid
  • Annual expert committee updates
  • Designed for medical professionals
Features
Read full description

Periop Pacemaker is a smartphone app that assists medical professionals who take care of surgical patients that have implantable defibrillators or pacemakers. The decision algorithm is endorsed by the Heart Rhythm Society and is based on the American Society of Anesthesiologists Perioperative Cardiac Implantable Electronic Device Management Aid. As device technology evolves, an expert committee of anesthesiologists, cardiologists, and device representatives will meet annually to keep information up-to-date. Disclaimer: ASA Pacemaker is designed for use by medical professionals only. Accessing the app content requires either a one-time payment of $7.99 USD or an annual subscription payment of $2.99 USD. A 30-day free trial is available under the annual subscription plan.

Screenshots

Master Anesthesia4 screens
Periop Pacemaker4 screens

Verdict

The call

The clearest difference is monetization model: Periop Pacemaker at free with in-app purchases against Master Anesthesia's subscription. Periop Pacemaker also leads on review sentiment (100% vs 78%) and iOS requirement (13.0 vs 15.1). Master Anesthesia's advantage is update cadence (weekly vs every 2 months) and ratings volume (2K vs 8). On price, rating, ads and in-app purchases 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 and Periop Pacemaker sells 2 in-app purchases, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Master Anesthesia against 5.0 for Periop Pacemaker. 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. Written reviews are what separate them: 78% of Master Anesthesia's written reviews are positive against 100% of Periop Pacemaker's.

UpkeepUpdate frequency

Master Anesthesia ships an update weekly, Periop Pacemaker every 2 months. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 5 level
Master Anesthesia versus Periop Pacemaker: the parameters behind the verdict, then further details
ParameterMaster AnesthesiaPeriop Pacemaker
PriceFreeFree
Rating4.9 (2K ratings)5.0 (8 ratings) — better
Positive reviews78.3% of reviews100.0% of reviews — better
Number of ratings2K — better8
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#154 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size69 MB43 MB
Age rating12+17+
DeveloperMatthew WillisRhythm Management, LLC

Customer experience

Master Anesthesia

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

Periop Pacemaker

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and 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

Periop Pacemaker

Not enough reviews yet to summarise bugs or requests.

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
2 purchases

Periop Pacemaker

Subscriptions1
  • PERIOP PACEMAKER ANNUAL FEE1 Month trial$2.991 Year
One-time1
  • Periop Pacemaker$7.99

Questions

Is Master Anesthesia free?
Master Anesthesia is free to download, with in-app purchases available.
Is Periop Pacemaker free?
Periop Pacemaker is free to download, with in-app purchases available.
Which has better reviews, Master Anesthesia or Periop Pacemaker?
Periop Pacemaker is rated higher. Master Anesthesia averages 4.9 out of 5 from 2K ratings, while Periop Pacemaker averages 5.0 from 8 ratings.
Do Master Anesthesia or Periop Pacemaker have ads?
Neither Master Anesthesia nor Periop Pacemaker shows ads.
Which is updated more often, Master Anesthesia or Periop Pacemaker?
Master Anesthesia ships an update weekly, and Periop Pacemaker every 2 months. Most recently, Master Anesthesia was updated on October 13, 2026 and Periop Pacemaker on September 27, 2026.

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