# Preop Eval vs Cause of Death Reference Guide

The clearest difference is rating: Preop Eval at 5.0 against Cause of Death Reference Guide's 4.2. Cause of Death Reference Guide's advantage is review sentiment (100% vs 67%) and update cadence (every 2 months vs every 6 months). 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 4.2. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews complicate that: 67% of Preop Eval's written reviews are positive against 100% of Cause of Death Reference Guide's, so the app with the better star average is not the one people write more warmly about.

Preop Eval ships an update every 6 months, Cause of Death Reference Guide every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Preop Eval | Cause of Death Reference Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/preop-eval/id374154834/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/cause-of-death-reference-guide/id1363232296/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 15 MB | 13 MB |
| Requires iOS | 16.6 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [United Health Services, Inc.](https://appshunter.io/developer/1451318916) | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) |

## 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


### Cause of Death Reference Guide

[App page](https://appshunter.io/ios/app/cause-of-death-reference-guide/id1363232296)

This app provides a quick reference for physicians and medical students on the US vital registration system and how to complete death certificates. It focuses on the physician's responsibility for certifying medical information, which is crucial for accurate death record-keeping.

**Highlights:** Vital registration system overview, Death certificate completion instructions, Emphasis on medical certification, Physician responsibility guidance, Quick reference for medical professionals

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Preop Eval free?

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

### Is Cause of Death Reference Guide free?

Cause of Death Reference Guide is free to download, with no in-app purchases.

### Which has better reviews, Preop Eval or Cause of Death Reference Guide?

Preop Eval is rated higher. Preop Eval averages 5.0 out of 5 from 2 ratings, while Cause of Death Reference Guide averages 4.2 from 5 ratings.

### Do Preop Eval or Cause of Death Reference Guide have ads?

Neither Preop Eval nor Cause of Death Reference Guide shows ads.

### Which is updated more often, Preop Eval or Cause of Death Reference Guide?

Preop Eval ships an update every 6 months, and Cause of Death Reference Guide every 2 months. Most recently, Preop Eval was updated on November 6, 2026 and Cause of Death Reference Guide on November 3, 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.*