# CathSource vs PCI App

The clearest difference is review sentiment: PCI App at 100% against CathSource's 43%. PCI App also leads on rating (5.0 vs 1.6) and monetization model (free vs paid). CathSource's advantage is ratings volume (23 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

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

PCI App holds the better App Store score, 5.0 against 1.6. Both are backed by a comparable volume of ratings — 23 and 5 respectively. Written reviews point the same way: 43% of CathSource's written reviews are positive against 100% of PCI App's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 18, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | CathSource | PCI App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/pci-app/id1607148631/reviews)** |
| Number of ratings | **23** | 5 |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 37 MB |
| Requires iOS | 18.5 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [KRUTSCH](https://appshunter.io/developer/1454678018) |

## 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


### PCI App

[App page](https://appshunter.io/ios/app/pci-app/id1607148631)

This medical app provides a step-by-step algorithmic guide for percutaneous coronary interventions. Users can browse detailed sections, watch case studies, and listen to relevant podcasts.

**Highlights:** Algorithmic step-by-step approach, Percutaneous coronary interventions, Browse parts, chapters, and sections, Watch case studies, Listen to podcasts

**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 PCI App free?

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

### Which has better reviews, CathSource or PCI App?

PCI App is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while PCI App averages 5.0 from 5 ratings.

### Do CathSource or PCI App have ads?

Neither CathSource nor PCI App shows ads.

### Which is updated more often, CathSource or PCI App?

CathSource ships an update every 2 months, and PCI App every 2 months. Most recently, CathSource was updated on September 18, 2026 and PCI App on September 7, 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.*