RBCX Calculation Tool vs HemeOncBuddy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
HemeOncBuddy
This app provides quick access to practice-changing clinical trials in Hematology and Oncology. It offers simplified summaries of trial background, inclusion/exclusion criteria, primary endpoints, and outcomes for easy reference.
- Practice-changing clinical trial summaries
- Hematology and Oncology focus
- Simplified trial information
- Inclusion and exclusion criteria
- Primary endpoints and outcomes
- Quick reference tool
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HemeOncBuddy is a free study hub built for hematology and oncology fellows and trainees - everything you need to keep up with the literature and prep for boards, in one fast, searchable app. WHAT'S INSIDE - 1,500+ pivotal clinical-trial summaries, each in the same structure (background, inclusion criteria, arms, primary/secondary endpoints, median follow-up, key results, notable toxicities) so you can scan them quickly. - A Question Bank with board-style questions, tutor and timed modes, explanations, and progress tracking. - ~2,000 active-recall flashcards across oncology, malignant and benign heme, and pharmacology — plus visual staging decks. - 120+ concise disease-site board-prep notes. - A conference & abstract-deadline tracker so you never miss a submission window. MADE FOR STUDYING - Full dark mode and adjustable text size. - Optional free account (Sign in with Apple, Google, or email) to sync your saved trials, Qbank progress, and notes across iPhone, iPad, and Mac. - No ads. No paywall. No login required to browse. HemeOncBuddy is an educational study aid only. It is not a substitute for medical advice, clinical judgment, or current guidelines, and must not be used to diagnose or treat patients. Always verify against primary literature and current guidelines.
Screenshots
Verdict
The clearest difference is rating: HemeOncBuddy at 5.0 against RBCX Calculation Tool's 4.8. HemeOncBuddy also leads on ratings volume (17 vs 5). On price, update cadence, 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.
HemeOncBuddy holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 5 and 17 respectively.
RBCX Calculation Tool ships an update every 15 months, HemeOncBuddy every 24 months. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.
| Parameter | RBCX Calculation Tool | HemeOncBuddy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5 ratings) | 5.0 (17 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 5 | 17 — better |
| Update frequency | Every 15 months — better | Every 24 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 16 MB |
| Age rating | 4+ | 17+ |
| Developer | Terumo BCT | Veli Bakalov |
Customer experience
RBCX Calculation Tool
HemeOncBuddy
In-app purchases
RBCX Calculation Tool
No in-app purchases
HemeOncBuddy
No in-app purchases
Questions
Is RBCX Calculation Tool free?
Is HemeOncBuddy free?
Which has better reviews, RBCX Calculation Tool or HemeOncBuddy?
Do RBCX Calculation Tool or HemeOncBuddy have ads?
Which is updated more often, RBCX Calculation Tool or HemeOncBuddy?
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