# RBCX Calculation Tool vs CARTOX

The clearest difference is iOS requirement: RBCX Calculation Tool at 15.6 against CARTOX's 26.4. On price, rating, ratings volume and update cadence there is nothing between them.

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

CARTOX holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 6 and 6 respectively.

RBCX Calculation Tool ships an update every 15 months, CARTOX every 20 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | RBCX Calculation Tool | CARTOX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (6 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/cartox/id1464005828/reviews)** |
| Number of ratings | 6 | 6 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 20 months |
| Monetization | Free | Free |
| Size | 26 MB | 6 MB |
| Requires iOS | **15.6** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Terumo BCT](https://appshunter.io/developer/1023483386) | [MD Anderson Cancer Center](https://appshunter.io/developer/618340093) |

## 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


### CARTOX

[App page](https://appshunter.io/ios/app/cartox/id1464005828)

This medical app aids clinicians in assessing and managing toxicities associated with cellular therapies, including Cytokine Release Syndrome (CRS) and Immune effector Cell-Associated Neurotoxicity Syndrome (ICANS). It provides grading methods and treatment recommendations for healthcare professionals caring for patients undergoing immune effector cell therapy.

**Highlights:** Toxicity grading, CRS assessment, ICANS assessment, Treatment recommendations, Antimicrobial prophylaxis guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is RBCX Calculation Tool free?

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

### Is CARTOX free?

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

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

CARTOX is rated higher. RBCX Calculation Tool averages 4.8 out of 5 from 6 ratings, while CARTOX averages 5.0 from 6 ratings.

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

Neither RBCX Calculation Tool nor CARTOX shows ads.

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

RBCX Calculation Tool ships an update every 15 months, and CARTOX every 20 months. Most recently, RBCX Calculation Tool was updated on October 24, 2026 and CARTOX on October 22, 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.*