# Preop Eval vs EFM Guide

The clearest difference is rating: Preop Eval at 5.0 against EFM Guide's 4.5. Preop Eval also leads on update cadence (every 6 months vs every 25 months) and review sentiment (67% vs 50%). EFM Guide's advantage is iOS requirement (13.0 vs 16.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Preop Eval holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 67% of Preop Eval's written reviews are positive against 50% of EFM Guide's.

Preop Eval ships an update every 6 months, EFM Guide every 25 months. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Preop Eval | EFM Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/preop-eval/id374154834/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/efm-guide/id375576665/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 25 months |
| Monetization | Free | Free |
| Size | 15 MB | 2 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [United Health Services, Inc.](https://appshunter.io/developer/1451318916) | [Joshua D. steinberg](https://appshunter.io/developer/374154837) |

## 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


### EFM Guide

[App page](https://appshunter.io/ios/app/efm-guide/id375576665)

A quick reference for medical trainees on electronic fetal monitoring (EFM) guidelines. It defines EFM findings, explains tracings with pictures, and outlines management recommendations. Designed for physicians, nurses, and midwives in training.

**Highlights:** EFM approach and nomenclature, Management recommendations, Definitions of EFM findings, Explanation of tracings with pictures, Systematic EFM evaluation review, Quick reference for trainees

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Preop Eval free?

Preop Eval is free to download, with no in-app purchases.

### Is EFM Guide free?

EFM Guide is free to download, with no in-app purchases.

### Which has better reviews, Preop Eval or EFM Guide?

Preop Eval is rated higher. Preop Eval averages 5.0 out of 5 from 2 ratings, while EFM Guide averages 4.5 from 2 ratings.

### Do Preop Eval or EFM Guide have ads?

Neither Preop Eval nor EFM Guide shows ads.

### Which is updated more often, Preop Eval or EFM Guide?

Preop Eval ships an update every 6 months, and EFM Guide every 25 months. Most recently, Preop Eval was updated on September 30, 2026 and EFM Guide on October 9, 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.*