# SplenoCalc vs RBCX Calculation Tool

The clearest difference is rating: RBCX Calculation Tool at 4.8 against SplenoCalc's 2.3. RBCX Calculation Tool also leads on update cadence (every 15 months vs every 30 months). SplenoCalc's advantage is iOS requirement (13.4 vs 15.6). 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.

RBCX Calculation Tool holds the better App Store score, 4.8 against 2.3. Both are backed by a comparable volume of ratings — 6 and 5 respectively.

SplenoCalc ships an update every 30 months, RBCX Calculation Tool every 15 months. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SplenoCalc | RBCX Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/splenocalc/id1005559584/reviews) | **[4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews)** |
| Number of ratings | **6** | 5 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 15 months** |
| Monetization | Free | Free |
| Size | 25 MB | 26 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [THE VATRIX GmbH](https://appshunter.io/developer/1585823767) | [Terumo BCT](https://appshunter.io/developer/1023483386) |

## What reviewers say

### SplenoCalc

[App page](https://appshunter.io/ios/app/splenocalc/id1005559584)

This medical app calculates approximate spleen size percentiles based on user height and gender. It utilizes an algorithm derived from height- and gender-corrected normal values for spleen length and volume. The app provides additional informational insights related to these calculations.

**Highlights:** Spleen size percentile calculation, Height and gender correction, Normal value-based algorithm, Spleen length and volume data, Additional informational insights

**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 SplenoCalc free?

SplenoCalc 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, SplenoCalc or RBCX Calculation Tool?

RBCX Calculation Tool is rated higher. SplenoCalc averages 2.3 out of 5 from 6 ratings, while RBCX Calculation Tool averages 4.8 from 5 ratings.

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

Neither SplenoCalc nor RBCX Calculation Tool shows ads.

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

SplenoCalc ships an update every 30 months, and RBCX Calculation Tool every 15 months. Most recently, SplenoCalc was updated on September 10, 2026 and RBCX Calculation Tool on June 1, 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.*