# SubtleSTEMI vs MCSAID

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.

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.

## The numbers

| Metric | SubtleSTEMI | MCSAID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (9 ratings)](https://appshunter.io/ios/app/subtlestemi/id617146818/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 40 months |
| Monetization | Free | — |
| Size | 15 MB | 46 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Mark Newcomb](https://appshunter.io/developer/617146821) | [Cardiology Apps LLC](https://appshunter.io/developer/1639925847) |

## What reviewers say

### SubtleSTEMI

[App page](https://appshunter.io/ios/app/subtlestemi/id617146818)

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.

**Highlights:** ECG formula implementation, Differentiates early repolarization, Identifies subtle anterior ST-segment elevation myocardial infarction, Diagnostic aid for medical professionals

**Features:** macOS Compatibility

**In-app purchases:** none


### MCSAID

[App page](https://appshunter.io/ios/app/mcsaid/id6443740248)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SubtleSTEMI free?

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

### Is MCSAID free?

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

### Do SubtleSTEMI or MCSAID have ads?

Neither SubtleSTEMI nor MCSAID shows ads.

### Which is updated more often, SubtleSTEMI or MCSAID?

SubtleSTEMI ships an update every 8 months, and MCSAID every 40 months. Most recently, SubtleSTEMI was updated on November 1, 2026 and MCSAID on November 3, 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.*