Comparison

Regional Anesthesia Reference 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

Regional Anesthesia Reference

This app offers a quick reference for regional nerve block placement using ultrasound. It includes detailed anatomy, patient positioning, and technique videos, along with a local anesthetic drug calculator.

Highlights
  • Ultrasound guidance for nerve blocks
  • Anatomy and positioning guides
  • Block placement technique videos
  • Local anesthetic drug calculator
  • List of current blocks
Features
Read full description

Regional Anesthesia Reference provides a quick look at the anatomy, positioning, and techniques for placing regional nerve blocks under ultrasound guidance. This includes ultrasound images and anatomic descriptions, images of patient positioning, and videos of block placement. Current blocks include: Interscalene Supraclavicular Infraclavicular Axillary Femoral Adductor Canal Suprainguinal Fascia Iliaca TAP Rectus Sheath Sciatic (Popliteal) A local anesthetic drug calculator is also included for assistance with calculating maximum dosages and percent of max dose delivered for a given patient. This is a weight based calculator using dosages from Miller's Anesthesia or Morgan and Mikhail.

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

Regional Anesthesia Reference4 screens
Master Anesthesia4 screens

Verdict

The call

The clearest difference is in-app purchases: Regional Anesthesia Reference at none against Master Anesthesia's 7. Regional Anesthesia Reference also leads on review sentiment (89% vs 78%) and iOS requirement (8.0 vs 15.1). Master Anesthesia's advantage is update cadence (weekly vs every 5 months) and ratings volume (2K vs 32). 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. Regional Anesthesia Reference 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 Regional Anesthesia Reference against 4.9 for Master Anesthesia. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 32, so its average is the more settled of the two. Written reviews are what separate them: 89% of Regional Anesthesia Reference's written reviews are positive against 78% of Master Anesthesia's.

UpkeepUpdate frequency

Regional Anesthesia Reference ships an update every 5 months, Master Anesthesia weekly. The most recent releases landed on September 25, 2026 and October 13, 2026 respectively.

Scorecard7 real differences · 4 level
Regional Anesthesia Reference versus Master Anesthesia: the parameters behind the verdict, then further details
ParameterRegional Anesthesia ReferenceMaster Anesthesia
PriceFreeFree
Rating5.0 (32 ratings) — better4.9 (2K ratings)
Positive reviews88.9% of reviews — better78.3% of reviews
Number of ratings322K — better
Update frequencyEvery 5 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
Best chart rank—#197 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.1
Further details — not scored
Size89 MB69 MB
Age rating17+12+
DeveloperUniversity Of WashingtonMatthew Willis

Customer experience

Regional Anesthesia Reference

All ratings32 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive88.9%
Neutral11.1%
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

Regional Anesthesia Reference

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

Regional Anesthesia Reference

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 Regional Anesthesia Reference free?
Regional Anesthesia Reference 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, Regional Anesthesia Reference or Master Anesthesia?
Regional Anesthesia Reference is rated higher. Regional Anesthesia Reference averages 5.0 out of 5 from 32 ratings, while Master Anesthesia averages 4.9 from 2K ratings.
Do Regional Anesthesia Reference or Master Anesthesia have ads?
Neither Regional Anesthesia Reference nor Master Anesthesia shows ads.
Which is updated more often, Regional Anesthesia Reference or Master Anesthesia?
Regional Anesthesia Reference ships an update every 5 months, and Master Anesthesia weekly. Most recently, Regional Anesthesia Reference was updated on September 25, 2026 and Master Anesthesia on October 13, 2026.

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