Coexisting Diseases & Surgery vs Master Anesthesia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Coexisting Diseases & Surgery
This medical reference app provides detailed information on common and rare diseases, including their description, etiology, diagnosis, treatment, and prognosis. It also offers guidance on managing surgical patients with coexisting conditions.
- Disease descriptions
- Etiology and onset
- Diagnosis and pathophysiology
- Treatment and prognosis
- Perioperative management
- Disease-related surgical concerns
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The Vargo Coexisting Diseases & Surgery App is a clinician-built resource designed to help anesthesia providers tailor anesthetic management to the patient’s underlying comorbidities and surgical considerations. Built from years of clinical experience, the app focuses on how coexisting diseases directly impact perioperative decision-making. Organized by major clinical systems, the app allows for rapid access to condition-specific anesthesia considerations—whether preparing for a case or managing complex patients in active clinical settings. The app is structured by major organ systems and disease categories, providing focused anesthesia guidance across a wide range of conditions: - Brain / Neuro Neurologic conditions and their impact on anesthesia management - Cardiac Hemodynamic considerations, cardiac pathology, and perioperative risk - Endocrine Diabetes, adrenal disorders, thyroid disease, and metabolic implications - Gastrointestinal GI disorders affecting anesthesia planning and intraoperative care - Hematologic Disorders Coagulopathies, anemia, and blood management considerations - Liver & Biliary Tract Hepatic dysfunction and implications for drug metabolism and coagulation - Pediatrics & OB/GYN Specialized considerations for pediatric and obstetric populations - Pulmonary Respiratory disease management and ventilation strategies - Renal Diseases Kidney dysfunction and fluid, electrolyte, and drug considerations - Congenital Heart Defects Structural cardiac conditions and tailored anesthesia approaches The app is built to provide clear, focused guidance that directly applies to clinical practice: Organized for rapid navigation by system and condition Emphasis on how disease states influence anesthetic planning Practical, case-driven considerations rather than general summaries This is a tool designed to help providers quickly answer the question: “How does this patient’s condition change my anesthetic plan?” The Vargo Coexisting Diseases & Surgery App is developed by experienced anesthesia providers who specialize in managing complex cases across a wide range of disease states. The content reflects real clinical decision-making and is continuously refined to remain relevant and practical. All future updates and additions are included with a one-time purchase. There are no subscriptions or recurring fees. Designed for every level of the anesthesia care team. Not just what to do—but the physiology driving every decision. Disclaimer: The Vargo Anesthesia Apps are intended for educational and clinical reference purposes only. These applications are designed to support clinical decision-making by trained healthcare professionals and are not a substitute for independent medical judgment, institutional policies, or current standards of care. Users are responsible for independently verifying all information, including drug dosages, calculations, and patient-specific considerations.
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 price: Master Anesthesia at Free against Coexisting Diseases & Surgery's $79.99. Master Anesthesia also leads on rating (4.9 vs 4.6) and ratings volume (2K vs 29). Coexisting Diseases & Surgery's advantage is in-app purchases (none vs 7) and chart position (#19 vs unranked). On review sentiment, 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
Master Anesthesia is free to download; Coexisting Diseases & Surgery costs $79.99 up front. Master Anesthesia sells 7 in-app purchases, starting at $69.99 per year. Coexisting Diseases & Surgery asks for nothing beyond the download.
Master Anesthesia holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Master Anesthesia has 2K ratings behind it against 29, so its average is the more settled of the two. Written reviews complicate that: 85% of Coexisting Diseases & Surgery's written reviews are positive against 78% of Master Anesthesia's, so the app with the better star average is not the one people write more warmly about.
Coexisting Diseases & Surgery ships an update monthly, Master Anesthesia weekly. Both last shipped on November 3, 2026.
| Parameter | Coexisting Diseases & Surgery | Master Anesthesia |
|---|---|---|
| Price | $79.99 | Free — better |
| Rating | 4.6 (29 ratings) | 4.9 (2K ratings) — better |
| Positive reviews | 84.6% of reviews — better | 78.5% of reviews |
| Number of ratings | 29 | 2K — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid — better | Subscription |
| Best chart rank | #19 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13 — better | 15.1 |
| Further details — not scored | ||
| Size | 212 MB | 66 MB |
| Age rating | 17+ | 12+ |
| Developer | Vargo Anesthesia Inc | Matthew Willis |
Customer experience
Coexisting Diseases & Surgery
Master Anesthesia
Bugs and requests
Coexisting Diseases & Surgery
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
Coexisting Diseases & Surgery
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 Coexisting Diseases & Surgery free?
Is Master Anesthesia free?
Which has better reviews, Coexisting Diseases & Surgery or Master Anesthesia?
Do Coexisting Diseases & Surgery or Master Anesthesia have ads?
Which is updated more often, Coexisting Diseases & Surgery or Master Anesthesia?
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