Comparison

RBCX Calculation Tool vs HemeOncBuddy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Estimate replacement fluid volume
  • Calculate target Hct and FCR
  • Determine custom prime recommendation
  • Uses patient and fluid data
  • Supports Spectra Optia system
Features
Read full description

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.

About

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.

Highlights
  • Practice-changing clinical trial summaries
  • Hematology and Oncology focus
  • Simplified trial information
  • Inclusion and exclusion criteria
  • Primary endpoints and outcomes
  • Quick reference tool
Features
Read full description

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

RBCX Calculation Tool4 screens
HemeOncBuddy4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
RBCX Calculation Tool versus HemeOncBuddy: the parameters behind the verdict, then further details
ParameterRBCX Calculation ToolHemeOncBuddy
PriceFreeFree
Rating4.8 (5 ratings)5.0 (17 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings517 — better
Update frequencyEvery 15 months — betterEvery 24 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size26 MB16 MB
Age rating4+17+
DeveloperTerumo BCTVeli Bakalov

Customer experience

RBCX Calculation Tool

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

HemeOncBuddy

All ratings17 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RBCX Calculation Tool

No in-app purchases

None

HemeOncBuddy

No in-app purchases

Questions

Is RBCX Calculation Tool free?
RBCX Calculation Tool is free to download, with no in-app purchases.
Is HemeOncBuddy free?
HemeOncBuddy is free to download, with no in-app purchases.
Which has better reviews, RBCX Calculation Tool or HemeOncBuddy?
HemeOncBuddy is rated higher. RBCX Calculation Tool averages 4.8 out of 5 from 5 ratings, while HemeOncBuddy averages 5.0 from 17 ratings.
Do RBCX Calculation Tool or HemeOncBuddy have ads?
Neither RBCX Calculation Tool nor HemeOncBuddy shows ads.
Which is updated more often, RBCX Calculation Tool or HemeOncBuddy?
RBCX Calculation Tool ships an update every 15 months, and HemeOncBuddy every 24 months. Most recently, RBCX Calculation Tool was updated on October 11, 2026 and HemeOncBuddy on October 2, 2026.

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