Regional Anesthesia Reference vs Master Anesthesia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Ultrasound guidance for nerve blocks
- Anatomy and positioning guides
- Block placement technique videos
- Local anesthetic drug calculator
- List of current blocks
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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.
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.
- 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
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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
Verdict
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
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.
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.
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.
| Parameter | Regional Anesthesia Reference | Master Anesthesia |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (32 ratings) — better | 4.9 (2K ratings) |
| Positive reviews | 88.9% of reviews — better | 78.3% of reviews |
| Number of ratings | 32 | 2K — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Best chart rank | — | #197 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 89 MB | 69 MB |
| Age rating | 17+ | 12+ |
| Developer | University Of Washington | Matthew Willis |
Customer experience
Regional Anesthesia Reference
Master Anesthesia
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
Regional Anesthesia Reference
No in-app purchases
Master Anesthesia
- Master Anesthesia Contributor7 Days trial$69.991 Year
- Full Access CE7 Days trial$449.001 Year
- Module Unlock$24.99
- Course Unlock$99.00
- Master Anesthesia One Time$99.99
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- One-Time$149.99
- Course Unlock$449.00
Questions
Is Regional Anesthesia Reference free?
Is Master Anesthesia free?
Which has better reviews, Regional Anesthesia Reference or Master Anesthesia?
Do Regional Anesthesia Reference or Master Anesthesia have ads?
Which is updated more often, Regional Anesthesia Reference or Master Anesthesia?
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