# CathSource vs STEMIcathAID

The clearest difference is rating: STEMIcathAID at 3.3 against CathSource's 1.6. STEMIcathAID also leads on monetization model (free vs paid) and iOS requirement (15.1 vs 18.5). On price, ratings volume, update cadence and ads there is nothing between them.

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

STEMIcathAID holds the better App Store score, 3.3 against 1.6. Both are backed by a comparable volume of ratings — 23 and 8 respectively.

CathSource ships an update every 2 months, STEMIcathAID every 3 months. The most recent releases landed on October 12, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | CathSource | STEMIcathAID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[3.3 (8 ratings)](https://appshunter.io/ios/app/stemicathaid/id1482930279/reviews)** |
| Number of ratings | **23** | 8 |
| Positive reviews | 38.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 71 MB |
| Requires iOS | 18.5 | **15.1** |
| Devices | iPhone, iPad | **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

### CathSource

[App page](https://appshunter.io/ios/app/cathsource/id420847275)

A comprehensive medical reference focused on cardiac catheterization and angiography. It offers a searchable index of specialized topics, a database of videos of common and rare findings, and a collection of images including hemodynamic formulas and tables.

**Highlights:** Searchable index of cardiac catheterization topics, Database of coronary angiogram, ventriculogram, and aortogram videos, Image database with hemodynamic formulas and tables, Covers common and rare cardiovascular pathologies, Developed by practicing Interventional Cardiologists

**Features:** macOS Compatibility

**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 CathSource free?

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

### Is STEMIcathAID free?

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

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

STEMIcathAID is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while STEMIcathAID averages 3.3 from 8 ratings.

### Do CathSource or STEMIcathAID have ads?

Neither CathSource nor STEMIcathAID shows ads.

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

CathSource ships an update every 2 months, and STEMIcathAID every 3 months. Most recently, CathSource was updated on October 12, 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.*