# ASTCT Practice Guidelines vs RBCX Calculation Tool

The clearest difference is update cadence: ASTCT Practice Guidelines at every 2 months against RBCX Calculation Tool's every 15 months. ASTCT Practice Guidelines also leads on rating (5.0 vs 4.8) and iOS requirement (13.0 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.

ASTCT Practice Guidelines holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 5 respectively.

ASTCT Practice Guidelines ships an update every 2 months, RBCX Calculation Tool every 15 months. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | ASTCT Practice Guidelines | RBCX Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/astct-practice-guidelines/id1204871675/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews) |
| Number of ratings | 4 | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 103 MB | 26 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [AMERICAN SOCIETY FOR BLOOD & MARROW TRASPLANTATION](https://appshunter.io/developer/1204871674) | [Terumo BCT](https://appshunter.io/developer/1023483386) |

## What reviewers say

### ASTCT Practice Guidelines

[App page](https://appshunter.io/ios/app/astct-practice-guidelines/id1204871675)

Access up-to-date practice guidelines, evidence-based reviews, and clinical calculators for blood, bone marrow transplantation, and cellular therapies. Developed by experts, this app aids clinical decision-making with immediate access to crucial information.

**Highlights:** Practice guidelines, Evidence-based reviews, Clinical calculators, HCT patient tools, Expert-developed content, Detailed references

**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 ASTCT Practice Guidelines free?

ASTCT Practice Guidelines 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, ASTCT Practice Guidelines or RBCX Calculation Tool?

ASTCT Practice Guidelines is rated higher. ASTCT Practice Guidelines averages 5.0 out of 5 from 4 ratings, while RBCX Calculation Tool averages 4.8 from 5 ratings.

### Do ASTCT Practice Guidelines or RBCX Calculation Tool have ads?

Neither ASTCT Practice Guidelines nor RBCX Calculation Tool shows ads.

### Which is updated more often, ASTCT Practice Guidelines or RBCX Calculation Tool?

ASTCT Practice Guidelines ships an update every 2 months, and RBCX Calculation Tool every 15 months. Most recently, ASTCT Practice Guidelines was updated on September 10, 2026 and RBCX Calculation Tool on June 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*