# CathSource vs CathPCI Risk Calculator

The clearest difference is update cadence: CathSource at every 2 months against CathPCI Risk Calculator's every 37 months. CathPCI Risk Calculator's advantage is iOS requirement (11.0 vs 18.5). 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.

CathSource ships an update every 2 months, CathPCI Risk Calculator every 37 months. The most recent releases landed on November 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CathSource | CathPCI Risk Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.6 (24 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 37 months |
| Monetization | Paid | — |
| Size | 79 MB | 21 MB |
| Requires iOS | 18.5 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [American College of Cardiology](https://appshunter.io/developer/502174543) |

## 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, Vision Pro support

**In-app purchases:** none


### CathPCI Risk Calculator

[App page](https://appshunter.io/ios/app/cathpci-risk-calculator/id1187934909)

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

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

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

### Is CathPCI Risk Calculator free?

CathPCI Risk Calculator is free to download, with no in-app purchases.

### Do CathSource or CathPCI Risk Calculator have ads?

Neither CathSource nor CathPCI Risk Calculator shows ads.

### Which is updated more often, CathSource or CathPCI Risk Calculator?

CathSource ships an update every 2 months, and CathPCI Risk Calculator every 37 months. Most recently, CathSource was updated on November 1, 2026 and CathPCI Risk Calculator on October 17, 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.*