# ECGsource vs STEMIcathAID

The clearest difference is price: STEMIcathAID at Free against ECGsource's $0.99. STEMIcathAID also leads on rating (3.3 vs 3.0). ECGsource's advantage is chart position (#42 vs unranked) and iOS requirement (9.0 vs 15.1). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

STEMIcathAID is free to download; ECGsource costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

STEMIcathAID holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 8 and 8 respectively.

ECGsource ships an update every 4 months, STEMIcathAID every 3 months. The most recent releases landed on September 21, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | ECGsource | STEMIcathAID |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (8 ratings)](https://appshunter.io/ios/app/ecgsource/id377139093/reviews) | **[3.3 (8 ratings)](https://appshunter.io/ios/app/stemicathaid/id1482930279/reviews)** |
| Number of ratings | 8 | 8 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#42** | — |
| Size | 349 MB | 71 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Icahn School of Medicine at Mount Sinai](https://appshunter.io/developer/972625667) |

## What reviewers say

### ECGsource

[App page](https://appshunter.io/ios/app/ecgsource/id377139093)

**Currently charting:** #42 Top Paid · Medical (US App Store)

This medical education app provides a searchable reference for ECG diagnoses and criteria, sample ECG images, and video tutorials. It's designed for medical students and professionals to aid in electrocardiogram interpretation and board review.

**Highlights:** Searchable ECG diagnoses and criteria, High-resolution sample ECG images, ECG quiz (demo), Video tutorials for beginners, Board review preparation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### STEMIcathAID

[App page](https://appshunter.io/ios/app/stemicathaid/id1482930279)

This medical app streamlines STEMI treatment by optimizing patient recognition, response, and record-keeping. It enhances communication and coordination among healthcare providers, reducing critical time to reperfusion for high-risk patients. Features include EKG upload, cardiogenic shock assessment, and live GPS tracking.

**Highlights:** EKG upload via smartphone, Cardiogenic shock assessment, STEMI patient transfer pathway, Live GPS tracking of EMS, HIPAA compliant encrypted collaboration, Notification system for cath lab preparation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ECGsource free?

ECGsource costs $0.99, with no in-app purchases.

### Is STEMIcathAID free?

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

### Which has better reviews, ECGsource or STEMIcathAID?

STEMIcathAID is rated higher. ECGsource averages 3.0 out of 5 from 8 ratings, while STEMIcathAID averages 3.3 from 8 ratings.

### Do ECGsource or STEMIcathAID have ads?

Neither ECGsource nor STEMIcathAID shows ads.

### Which is updated more often, ECGsource or STEMIcathAID?

ECGsource ships an update every 4 months, and STEMIcathAID every 3 months. Most recently, ECGsource was updated on September 21, 2026 and STEMIcathAID on September 28, 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.*