SplenoCalc vs RBCX Calculation Tool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SplenoCalc
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.
- Spleen size percentile calculation
- Height and gender correction
- Normal value-based algorithm
- Spleen length and volume data
- Additional informational insights
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Spleen size is significantly influenced by body height and gender. The Splenocalc App is designed to calculate approximate percentiles of an individual´s spleen size. The algorithm of the Splenocalc App is based on the height- and gender-corrected normal values for homeostatic spleen length and volume (for women between 155 and 179 cm and men between 165 and 199 cm body height), the Splenocalc App is performing these calculations and is providing additional information.
RBCX Calculation Tool
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.
- Estimate replacement fluid volume
- Calculate target Hct and FCR
- Determine custom prime recommendation
- Uses patient and fluid data
- Supports Spectra Optia system
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The Spectra Optia® Apheresis System RBCX Calculation Tool is intended to help medical professionals who are responsible for prescribing and performing red blood cell exchange (RBCX) procedures to estimate the volume of replacement fluid required to perform a procedure on the Spectra Optia system. Using the same patient data and the same fluid data that is entered on the Spectra Optia system, the RBCX Calculation Tool calculates and displays the estimated volume of replacement fluid required to achieve the target Hct and FCR. It can also determine whether a custom prime is recommended. While the tool is intended to help prepare for a procedure, it is not intended to be used for making medical decisions. Use of the Spectra Optia® Apheresis System RBCX Calculation Tool on iOS requires iOS version 14.0 or above. For more information about the tool, see the About page.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SplenoCalc | RBCX Calculation Tool |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (6 ratings) | 4.8 (5 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 6 — better | 5 |
| Update frequency | Every 30 months | Every 15 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 25 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | THE VATRIX GmbH | Terumo BCT |
Customer experience
SplenoCalc
RBCX Calculation Tool
In-app purchases
SplenoCalc
No in-app purchases
RBCX Calculation Tool
No in-app purchases
Questions
Is SplenoCalc free?
Is RBCX Calculation Tool free?
Which has better reviews, SplenoCalc or RBCX Calculation Tool?
Do SplenoCalc or RBCX Calculation Tool have ads?
Which is updated more often, SplenoCalc or RBCX Calculation Tool?
Other comparisons
