# RBCX Calculation Tool vs SIMPL Bedside

The clearest difference is ads: RBCX Calculation Tool at none against SIMPL Bedside's shown. SIMPL Bedside's advantage is update cadence (every 2 months vs every 15 months). On price, in-app purchases, device support and iOS requirement 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 ships an update every 15 months, SIMPL Bedside every 2 months. The most recent releases landed on June 1, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | RBCX Calculation Tool | SIMPL Bedside |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 26 MB | 16 MB |
| Requires iOS | 15.6 | **14.5** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Terumo BCT](https://appshunter.io/developer/1023483386) | [Procedural Learning and Safety Collaborative, Inc](https://appshunter.io/developer/970265410) |

## 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


### SIMPL Bedside

[App page](https://appshunter.io/ios/app/simpl-bedside/id1501358895)

**Features:** macOS Compatibility

**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 SIMPL Bedside free?

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

### Do RBCX Calculation Tool or SIMPL Bedside have ads?

SIMPL Bedside shows ads; RBCX Calculation Tool does not.

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

RBCX Calculation Tool ships an update every 15 months, and SIMPL Bedside every 2 months. Most recently, RBCX Calculation Tool was updated on June 1, 2026 and SIMPL Bedside on September 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.*