# eGVHD vs RBCX Calculation Tool

The clearest difference is rating: eGVHD at 5.0 against RBCX Calculation Tool's 4.8. eGVHD also leads on iOS requirement (9.0 vs 15.6). On price, ratings volume, update cadence and ads there is nothing between them.

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

eGVHD holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

eGVHD ships an update every 16 months, RBCX Calculation Tool every 15 months. The most recent releases landed on September 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | eGVHD | RBCX Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/egvhd/id1355873791/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews) |
| Number of ratings | 2 | **5** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 15 months** |
| Monetization | Free | Free |
| Size | 81 MB | 26 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [nexuzhealth NV](https://appshunter.io/developer/1311365149) | [Terumo BCT](https://appshunter.io/developer/1023483386) |

## What reviewers say

### eGVHD

[App page](https://appshunter.io/ios/app/egvhd/id1355873791)

This educational tool assists healthcare professionals in assessing and scoring the severity of graft versus host disease (GVHD) in allogeneic stem cell transplantation recipients. It uses an algorithm-driven approach to apply internationally recognized criteria, providing differential information and automatic summaries to aid diagnosis.

**Highlights:** Algorithm-driven assessment, GVHD severity scoring, Differential information display, Automatic summary generation, Educational tool for clinicians

**Features:** macOS Compatibility

**In-app purchases:** none


### RBCX Calculation Tool

[App page](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121)

This medical tool assists healthcare professionals in estimating the required replacement fluid volume for red blood cell exchange procedures on the Spectra Optia system. It calculates volumes based on patient and fluid data to achieve target Hct and FCR, and can suggest custom primes.

**Highlights:** Estimate replacement fluid volume, Calculate target Hct and FCR, Determine custom prime recommendation, Uses patient and fluid data, Supports Spectra Optia system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eGVHD free?

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

### Is RBCX Calculation Tool free?

RBCX Calculation Tool is free to download, with no in-app purchases.

### Which has better reviews, eGVHD or RBCX Calculation Tool?

eGVHD is rated higher. eGVHD averages 5.0 out of 5 from 2 ratings, while RBCX Calculation Tool averages 4.8 from 5 ratings.

### Do eGVHD or RBCX Calculation Tool have ads?

Neither eGVHD nor RBCX Calculation Tool shows ads.

### Which is updated more often, eGVHD or RBCX Calculation Tool?

eGVHD ships an update every 16 months, and RBCX Calculation Tool every 15 months. Most recently, eGVHD was updated on September 16, 2026 and RBCX Calculation Tool on October 11, 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.*