# RBCX Calculation Tool vs CTCAE 5 Pro

The clearest difference is in-app purchases: RBCX Calculation Tool at none against CTCAE 5 Pro's 2. CTCAE 5 Pro's advantage is update cadence (every 5 weeks vs every 15 months) and ratings volume (38 vs 5). On price, rating, ads and device support there is nothing between them.

Both are free to download. CTCAE 5 Pro sells 2 in-app purchases, starting at $1.99 per month. RBCX Calculation Tool asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for RBCX Calculation Tool against 4.8 for CTCAE 5 Pro. That said, the two scores are not equally well evidenced: CTCAE 5 Pro has 38 ratings behind it against 5, so its average is the more settled of the two.

RBCX Calculation Tool ships an update every 15 months, CTCAE 5 Pro every 5 weeks. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | RBCX Calculation Tool | CTCAE 5 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews) | [4.8 (38 ratings)](https://appshunter.io/ios/app/ctcae-5-pro/id1625569535/reviews) |
| Number of ratings | 5 | **38** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 5 weeks** |
| Monetization | **Free** | Freemium |
| Size | 26 MB | 60 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Terumo BCT](https://appshunter.io/developer/1023483386) | [Koichiro Watanabe](https://appshunter.io/developer/1077985400) |

## What reviewers say

### 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


### CTCAE 5 Pro

[App page](https://appshunter.io/ios/app/ctcae-5-pro/id1625569535)

This app helps review and take notes on CTCAE documents. It offers local data storage for privacy and premium features like version comparison and advanced note-taking with a subscription.

**Highlights:** Streamlined CTCAE Document Access, Local data storage for enhanced privacy, Version comparison tool, Advanced chronological note-taking with hashtags, Custom app creation from spreadsheets, Flexible backup and archiving (XLSX, CSV)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Annual subscription | $9.99 | per year |


## Frequently asked questions

### Is RBCX Calculation Tool free?

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

### Is CTCAE 5 Pro free?

CTCAE 5 Pro is free to download, with in-app purchases available.

### Which has better reviews, RBCX Calculation Tool or CTCAE 5 Pro?

RBCX Calculation Tool and CTCAE 5 Pro are both rated 4.8 out of 5 on the App Store, from 5 and 38 ratings respectively.

### Do RBCX Calculation Tool or CTCAE 5 Pro have ads?

Neither RBCX Calculation Tool nor CTCAE 5 Pro shows ads.

### Which is updated more often, RBCX Calculation Tool or CTCAE 5 Pro?

RBCX Calculation Tool ships an update every 15 months, and CTCAE 5 Pro every 5 weeks. Most recently, RBCX Calculation Tool was updated on October 11, 2026 and CTCAE 5 Pro 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.*