SubtleSTEMI vs MCSAID
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SubtleSTEMI
This medical app calculates the formula from a specific research paper to help differentiate early repolarization from subtle anterior ST-segment elevation myocardial infarction. It provides a tool for medical professionals to aid in diagnosis.
- ECG formula implementation
- Differentiates early repolarization
- Identifies subtle anterior ST-segment elevation myocardial infarction
- Diagnostic aid for medical professionals
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Calculator implementing the formula from the paper, "Electrocardiographic differentiation of early repolarization from subtle anterior st-segment elevation myocardial infarction," by Smith, et al.
MCSAID
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MCSAID is an educational application dedicated to the topic of mechanical cardiocirculatory support for patients with cardiogenic shock. A basic section introduces the definitions and classifications of cardiogenic shock as well as some of the common devices used for hemodynamic support in unstable patients. There is an algorithm for helping understand the decision process depending on key clinical variables such as cardiac output and PAPI. There are also several weaning and escalation algorithm. A calculator section is available for some common hemodynamic variables used in MCS decision-making and is available for quick-reference throughout the algorithm. MCSAID is an educational application for medical professionals and is not intended for making medical diagnoses. Medical decisions must be made by licensed professionals with the entire context of a patient’s medical history. If you are seeking a medical diagnosis, contact your physician and if you are experiencing a medical emergency, call your local emergency medical services.
Screenshots
Verdict
The clearest difference is update cadence: SubtleSTEMI at every 8 months against MCSAID's every 40 months. SubtleSTEMI also leads on iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and device support 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.
SubtleSTEMI ships an update every 8 months, MCSAID every 40 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | SubtleSTEMI | MCSAID |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (9 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 8 months — better | Every 40 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 46 MB |
| Age rating | 17+ | 17+ |
| Developer | Mark Newcomb | Cardiology Apps LLC |
In-app purchases
SubtleSTEMI
No in-app purchases
MCSAID
No in-app purchases







