# Preop Eval vs DAPT Risk Calculator

The clearest difference is rating: Preop Eval at 5.0 against DAPT Risk Calculator's 4.5. Preop Eval also leads on update cadence (every 6 months vs every 17 months). DAPT Risk Calculator'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.

Preop Eval ships an update every 6 months, DAPT Risk Calculator every 17 months. The most recent releases landed on September 10, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Preop Eval | DAPT Risk Calculator |
| --- | --- | --- |
| 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/dapt-risk-calculator/id1175079741/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 17 months |
| Monetization | Free | Free |
| Size | 15 MB | 46 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [United Health Services, Inc.](https://appshunter.io/developer/1451318916) | [American College of Cardiology](https://appshunter.io/developer/502174543) |

## 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


### DAPT Risk Calculator

[App page](https://appshunter.io/ios/app/dapt-risk-calculator/id1175079741)

This tool helps clinicians assess the risk and benefit of continuing dual antiplatelet therapy (DAPT) for patients at least 12 months post-PCI. It provides a numerical DAPT Risk Score and calculates the percentage risk for key cardiovascular events.

**Highlights:** DAPT Risk Score calculation, Risk/benefit analysis for DAPT continuation, Percentage risk for MI, Percentage risk for Stent Thrombosis/MACCE, Percentage risk for Bleeding

**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 DAPT Risk Calculator free?

DAPT Risk Calculator is free to download, with no in-app purchases.

### Which has better reviews, Preop Eval or DAPT Risk Calculator?

Preop Eval is rated higher. Preop Eval averages 5.0 out of 5 from 2 ratings, while DAPT Risk Calculator averages 4.5 from 2 ratings.

### Do Preop Eval or DAPT Risk Calculator have ads?

Neither Preop Eval nor DAPT Risk Calculator shows ads.

### Which is updated more often, Preop Eval or DAPT Risk Calculator?

Preop Eval ships an update every 6 months, and DAPT Risk Calculator every 17 months. Most recently, Preop Eval was updated on September 10, 2026 and DAPT Risk Calculator on September 12, 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.*