Comparison

ASRA Coags 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

ASRA Coags

This app provides quick access to anticoagulation guidelines for regional anesthesia and interventional pain procedures. It offers drug-specific summaries, recommendations based on procedure type, and detailed information on medication mechanisms and guideline documents.

Highlights
  • Anticoagulation guideline reference
  • Drug-specific summary information
  • Regional anesthesia guidelines
  • Interventional pain guidelines
  • Search by drug or procedure
  • Recommendations by block and intervention type
Features
Read full description

The ASRA COAGS app has been updated with a universal code base and a fresh new look. This subscription-based app is $6.99/annually or free with ASRA Pain Medicine membership. The app transforms the American Society of Regional Anesthesia and Pain Medicine anticoagulation guidelines for Regional Anesthesia and Interventional Pain Procedures into a quick and easy reference for your practice. It provides rapid access to drug-specific summary information. This version combines the most current recommendations from two separate publications: 1. The 2025 guidelines “Regional anesthesia in the patient receiving antithrombotic or thrombolytic therapy: American Society of Regional Anesthesia and Pain Medicine Evidence- Based Guidelines (Fifth Edition)” published in Regional Anesthesia & Pain Medicine. 2. The 2018 Interventional Pain guidelines from the publication “Interventional Spine and Pain Procedures in Patients on Antiplatelet and Anticoagulant Medications (Second Edition); Guidelines From the American Society of Regional Anesthesia and Pain Medicine, the European Society of Regional Anaesthesia and Pain Therapy, the American Academy of Pain Medicine, the International Neuromodulation Society, the North American Neuromodulation Society, and the World Institute of Pain” published in Regional Anesthesia & Pain Medicine. The app provides direct access to both the regional guidelines and the pain guidelines, also allowing you to choose a default and focus on your specific practice area. Regional Guidelines: 1. Search for drugs by brand name or generic name. 2. Get recommendations based on the block type (e.g. neuraxial, peripheral, obstetric) and the intervention type (e.g. placing a block or removing a catheter). 3. Access more detailed information by using the Information "i" button: a. Mechanism of action for each drug. b. Executive summary for each drug. c. The full 2025 ASRA Pain Medicine regional guideline document. Pain Guidelines: 1. Search for drugs by brand name or generic name. Or start your search by procedure. 2. Get recommendations for: a. High, intermediate, and low risk procedures. b. Modifiers for patients at higher bleeding risk. c. Herbal medications. d. Antidepressant medications. e. When to restart medications after a procedure. 3. Access more detailed information for any drug by using the Information "i" button: a. Mechanism of action for each drug. b. Executive summary for each drug. c. The full 2018 ASRA Pain Medicine interventional pain guideline document. Members of ASRA Pain Medicine receive all society apps for free with their membership. To learn more or to join, visit asra.com/membership. Non-members have access to the content with a low-cost annual subscription.

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

ASRA Coags4 screens
Master Anesthesia4 screens

Verdict

The call

The clearest difference is review sentiment: Master Anesthesia at 79% against ASRA Coags's 10%. Master Anesthesia also leads on rating (4.9 vs 1.3) and update cadence (every 6 days vs every 3 months). ASRA Coags's advantage is in-app purchases (none vs 7) and iOS requirement (13.4 vs 15.1). On price, ads, monetization model 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. ASRA Coags asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Master Anesthesia holds the better App Store score, 4.9 against 1.3. Both are backed by a comparable volume of ratings — 407 and 2K respectively. Written reviews point the same way: 10% of ASRA Coags's written reviews are positive against 79% of Master Anesthesia's.

UpkeepUpdate frequency

ASRA Coags ships an update every 3 months, Master Anesthesia every 6 days. The most recent releases landed on September 21, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 4 level
ASRA Coags versus Master Anesthesia: the parameters behind the verdict, then further details
ParameterASRA CoagsMaster Anesthesia
PriceFreeFree
Rating1.3 (407 ratings)4.9 (2K ratings) — better
Positive reviews9.7% of reviews79.1% of reviews — better
Number of ratings4072K — better
Update frequencyEvery 3 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationSubscriptionSubscription
Best chart rank—#120 — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.4 — better15.1
Further details — not scored
Size27 MB69 MB
Age rating17+12+
DeveloperAmerican Society of Regional Anesthesia and Pain MedicineMatthew Willis

Customer experience

ASRA Coags

All ratings407 ratings
Positive6.6%
Neutral0.2%
Negative93.1%
Written reviews207 reviews
Positive9.7%
Neutral0.5%
Negative89.9%

Master Anesthesia

All ratings1,985 ratings
Positive97.8%
Neutral0.7%
Negative1.5%
Written reviews91 reviews
Positive79.1%
Neutral4.4%
Negative16.5%

Bugs and requests

ASRA Coags

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

ASRA Coags

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 ASRA Coags free?
ASRA Coags 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, ASRA Coags or Master Anesthesia?
Master Anesthesia is rated higher. ASRA Coags averages 1.3 out of 5 from 407 ratings, while Master Anesthesia averages 4.9 from 2K ratings.
Do ASRA Coags or Master Anesthesia have ads?
Neither ASRA Coags nor Master Anesthesia shows ads.
Which is updated more often, ASRA Coags or Master Anesthesia?
ASRA Coags ships an update every 3 months, and Master Anesthesia every 6 days. Most recently, ASRA Coags was updated on September 21, 2026 and Master Anesthesia on September 25, 2026.

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