# CathSource vs Philips Coronary IVUS Tutor

The clearest difference is rating: Philips Coronary IVUS Tutor at 4.1 against CathSource's 1.6. Philips Coronary IVUS Tutor also leads on monetization model (free vs paid) and iOS requirement (15.0 vs 18.5). CathSource's advantage is update cadence (every 2 months vs every 13 months) and ratings volume (23 vs 7). On price, review sentiment, 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.

Philips Coronary IVUS Tutor holds the better App Store score, 4.1 against 1.6. Both are backed by a comparable volume of ratings — 23 and 7 respectively. Written reviews point the same way: 43% of CathSource's written reviews are positive against 50% of Philips Coronary IVUS Tutor's.

CathSource ships an update every 2 months, Philips Coronary IVUS Tutor every 13 months. The most recent releases landed on September 18, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | CathSource | Philips Coronary IVUS Tutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[4.1 (7 ratings)](https://appshunter.io/ios/app/philips-coronary-ivus-tutor/id1102922767/reviews)** |
| Number of ratings | **23** | 7 |
| Positive reviews | 42.9% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 13 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 21 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Philips Electronics North America Corporation](https://appshunter.io/developer/479329238) |

## 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


### Philips Coronary IVUS Tutor

[App page](https://appshunter.io/ios/app/philips-coronary-ivus-tutor/id1102922767)

An interactive program for healthcare professionals to learn the fundamentals of coronary intravascular ultrasound. It offers simulated IVUS pullbacks, an image interpretation guide, and a knowledge check quiz to enhance understanding of vessel morphologies.

**Highlights:** Simulate IVUS pullbacks and measurements, Interactive workflow, Image interpretation guide, Identify vessel morphologies, Knowledge check quiz

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

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

### Is Philips Coronary IVUS Tutor free?

Philips Coronary IVUS Tutor is free to download, with no in-app purchases.

### Which has better reviews, CathSource or Philips Coronary IVUS Tutor?

Philips Coronary IVUS Tutor is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while Philips Coronary IVUS Tutor averages 4.1 from 7 ratings.

### Do CathSource or Philips Coronary IVUS Tutor have ads?

Neither CathSource nor Philips Coronary IVUS Tutor shows ads.

### Which is updated more often, CathSource or Philips Coronary IVUS Tutor?

CathSource ships an update every 2 months, and Philips Coronary IVUS Tutor every 13 months. Most recently, CathSource was updated on September 18, 2026 and Philips Coronary IVUS Tutor 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.*