Comparison

Preop Eval vs avoMD

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

Head to head
About

Preop Eval

This app provides guidance for evaluating and preparing adult patients for non-cardiac surgery. It includes algorithms and resources on medication management, cardiac event timing, and preoperative testing, serving as both a reference and a teaching tool for medical professionals.

Highlights
  • Cardiac evaluation algorithm
  • Medication guidance (starting/stopping)
  • Surgery timing after cardiac events
  • Preoperative testing recommendations
  • Review for students and residents
  • Perioperative insulin management
Features
Read full description

Preop Eval organizes and presents much of the guidance that one needs in order to evaluate and prepare adult patients for non-cardiac surgery. It is based upon the guidelines on this topic from the American College of Cardiology, the European Society of Anaesthesiology, the American Society of Anesthesiologists, the Institute for Clinical Systems Improvement, the American College of Chest Physicians, and more (full references in the app). The app contains 1 algorithm and 3 resources: the cardiac evaluation algorithm, guidance on starting and stopping key medications in the perioperative period, guidance on timing of surgery after cardiac events, and guidance on preoperative testing. It also contains a review of preoperative evaluation mainly for students and residents. The app addresses such common questions as: - who needs bloodwork before surgery? - who needs an EKG or a CXR? - how do I handle patients on warfarin, clopidogrel, and DOAC's? - which patients need adjustment of perioperative insulin and diabetic meds, and how? - which active cardiac conditions preclude surgery? - how long after MI or stent should a patient wait before surgery? - are there adjustments to make on psych meds, rheumatologic meds, ACE's and ARB's? This app is written and intended for practicing physicians like internists, family physicians, and hospitalists; for resident physician trainees; and for medical students. In addition to being a reference, the algorithm is written to be a teaching tool by not just delivering an answer, but instead walking a physician through the evaluation process so that one learns that process along the way. As an educator and clinician, I am interested in feedback and I would be grateful for guidance on improving the tool.

About

avoMD

This app offers interactive guidance for clinicians evaluating adult patients for noncardiac surgery. It incorporates co-morbidities, medications, and medical calculators based on established guidelines and literature reviews. Enhance your learning with evidence-based references and detailed explanations.

Highlights
  • Interactive patient evaluation
  • Preoperative risk assessment
  • Medical calculators (RCRI, MICA, etc.)
  • Evidence-based references
  • Literature review integration
  • Co-morbidity and medication tracking
Features
Read full description

avoMD: Preoperative Eval provides quick, interactive, and educational guidance to help clinicians evaluate and prepare adult patients for noncardiac surgery. The app is based primarily on the 2014 ACC/AHA Perioperative Guidelines but also includes additional comments from reviews of the literature up to September 2020. It was developed in conjunction with Dr. Steven Cohn, a leading expert in Perioperative Medicine. The app incorporates co-morbidities, patient medications, interactive medical calculators (like RCRI, MICA, ACS-SRC, DASI), and other information and tools to help clinicians assess the risk of surgery. avoMD provides links to the evidence-based references and best practices, as well as more detailed explanations on the recommendations, so that clinicians can enhance their learning experience. Dr. Steven Cohn is currently Professor Emeritus at the University of Miami Miller School of Medicine, having served as the Medical Director of the UHealth Preoperative Assessment Center (UPAC) and the Medical Consultation Services at the University of Miami Hospital and Jackson Memorial Hospital. He was the former Chief of the Division of General Internal Medicine at SUNY Downstate and the Director of the Preoperative Medical Consultation Clinic and Medical Consultation Service at Kings County Hospital Center. avoMD transforms clinical guidelines and content into interactive, next-gen apps. The team is led by physicians and informaticians from Columbia, Yale, and Harvard, while current partners include leading academic medical centers, urgent care providers and a growing number of residency programs and medical schools across the US. The company won the 2020 pitch competitions at Columbia Engineering and Penn Medicine and recently joined StartUp Health and 500 Startups. Interested in customizing avoMD for your department/institution? Contact info@avomd.io for more information.

Screenshots

Preop Eval4 screens
avoMD4 screens

Verdict

The call

The clearest difference is in-app purchases: Preop Eval at none against avoMD's 4. avoMD's advantage is review sentiment (100% vs 67%) and update cadence (every 9 days vs every 6 months). 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. avoMD sells 4 in-app purchases, starting at $9.99 per year. Preop Eval 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 Preop Eval against 5.0 for avoMD. That said, the two scores are not equally well evidenced: avoMD has 16 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 67% of Preop Eval's written reviews are positive against 100% of avoMD's.

UpkeepUpdate frequency

Preop Eval ships an update every 6 months, avoMD every 9 days. Both last shipped on September 30, 2026.

Scorecard6 real differences · 4 level
Preop Eval versus avoMD: the parameters behind the verdict, then further details
ParameterPreop EvalavoMD
PriceFreeFree
Rating5.0 (2 ratings)5.0 (16 ratings)
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings216 — better
Update frequencyEvery 6 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size15 MB20 MB
Age rating17+12+
DeveloperUnited Health Services, Inc.avoMD, Inc

Customer experience

Preop Eval

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive66.7%
Neutral8.3%
Negative25.0%

avoMD

All ratings16 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Preop Eval

No in-app purchases

4 purchases

avoMD

Subscriptions4
  • 1 Year Assitance 1 month trial1 Month trial$9.991 Year
  • 1 year assistance 3 month free3 Months trial$9.991 Year
  • Institutional Plan$14.991 Year
Show 1 more
  • 1 year assistance 6 month free6 Months trial$19.991 Year

Questions

Is Preop Eval free?
Preop Eval is free to download, with no in-app purchases.
Is avoMD free?
avoMD is free to download, with in-app purchases available.
Which has better reviews, Preop Eval or avoMD?
Preop Eval and avoMD are both rated 5.0 out of 5 on the App Store, from 2 and 16 ratings respectively.
Do Preop Eval or avoMD have ads?
Neither Preop Eval nor avoMD shows ads.
Which is updated more often, Preop Eval or avoMD?
Preop Eval ships an update every 6 months, and avoMD every 9 days. Most recently, Preop Eval was updated on September 30, 2026 and avoMD on September 30, 2026.

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