# Preop Eval vs avoMD

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.

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.

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.

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

## The numbers

| Metric | Preop Eval | avoMD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/preop-eval/id374154834/reviews) | [5.0 (16 ratings)](https://appshunter.io/ios/app/avomd-preoperative-eval/id1550142027/reviews) |
| Number of ratings | 2 | **16** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 20 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [United Health Services, Inc.](https://appshunter.io/developer/1451318916) | [avoMD, Inc](https://appshunter.io/developer/1504289347) |

## What reviewers say

### Preop Eval

[App page](https://appshunter.io/ios/app/preop-eval/id374154834)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### avoMD

[App page](https://appshunter.io/ios/app/avomd-preoperative-eval/id1550142027)

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:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year Assitance 1 month trial | $9.99 | per year |
| 1 year assistance 3 month free | $9.99 | per year |
| Institutional Plan | $14.99 | per year |
| 1 year assistance 6 month free | $19.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*