# RBCX Calculation Tool vs KiKo

The clearest difference is update cadence: KiKo at weekly against RBCX Calculation Tool's every 15 months. KiKo also leads on rating (5.0 vs 4.8) and ratings volume (22 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

KiKo holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 22 respectively.

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

## The numbers

| Metric | RBCX Calculation Tool | KiKo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews) | **[5.0 (22 ratings)](https://appshunter.io/ios/app/kiko/id1476144292/reviews)** |
| Number of ratings | 5 | **22** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Weekly** |
| Monetization | Free | Free |
| Size | 26 MB | 41 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Terumo BCT](https://appshunter.io/developer/1023483386) | [Objektyv, LLC](https://appshunter.io/developer/1476144291) |

## 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


### KiKo

[App page](https://appshunter.io/ios/app/kiko/id1476144292)

A platform for medical professionals to publish, collaborate, and discuss cases. Share clinical knowledge, create private study groups, and view pathology images on mobile. Build your reputation by sharing expertise and earning experience points.

**Highlights:** Self-publish medical knowledge, Collaborate with peers, Discuss rare clinical cases, Share pathology images, Create private study groups, Earn experience points (XP)

**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 KiKo free?

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

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

KiKo is rated higher. RBCX Calculation Tool averages 4.8 out of 5 from 5 ratings, while KiKo averages 5.0 from 22 ratings.

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

Neither RBCX Calculation Tool nor KiKo shows ads.

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

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