# CRRT Dose Calculator vs RBCX Calculation Tool

The clearest difference is rating: RBCX Calculation Tool at 4.8 against CRRT Dose Calculator's 1.0. RBCX Calculation Tool also leads on ratings volume (6 vs 1). CRRT Dose Calculator's advantage is iOS requirement (8.0 vs 15.6). On price, update cadence, 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 1.0. That said, the two scores are not equally well evidenced: RBCX Calculation Tool has 6 ratings behind it against 1, so its average is the more settled of the two.

CRRT Dose Calculator ships an update every 10 months, RBCX Calculation Tool every 15 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CRRT Dose Calculator | RBCX Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/crrt-dose-calculator/id1162153437/reviews) | **[4.8 (6 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews)** |
| Number of ratings | 1 | **6** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 3 MB | 26 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Baxter Healthcare Corporation](https://appshunter.io/developer/410026240) | [Terumo BCT](https://appshunter.io/developer/1023483386) |

## What reviewers say

### CRRT Dose Calculator

[App page](https://appshunter.io/ios/app/crrt-dose-calculator/id1162153437)

This medical tool calculates the effluent dose for Continuous Renal Replacement Therapy (CRRT). It supports four CRRT modalities and allows users to configure pre/post replacement flow and regional citrate anticoagulation settings.

**Highlights:** CRRT dose calculation, Supports CVVHDF, CVVH, CVVHD, SCUF modalities, Pre/post replacement flow settings, Regional citrate anticoagulation settings

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

**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 CRRT Dose Calculator free?

CRRT Dose Calculator 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, CRRT Dose Calculator or RBCX Calculation Tool?

RBCX Calculation Tool is rated higher. CRRT Dose Calculator averages 1.0 out of 5 from 1 ratings, while RBCX Calculation Tool averages 4.8 from 6 ratings.

### Do CRRT Dose Calculator or RBCX Calculation Tool have ads?

Neither CRRT Dose Calculator nor RBCX Calculation Tool shows ads.

### Which is updated more often, CRRT Dose Calculator or RBCX Calculation Tool?

CRRT Dose Calculator ships an update every 10 months, and RBCX Calculation Tool every 15 months. Most recently, CRRT Dose Calculator was updated on October 14, 2026 and RBCX Calculation Tool on October 24, 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.*