# CathSource vs IVUS + Physiology Pro

The clearest difference is review sentiment: IVUS + Physiology Pro at 100% against CathSource's 43%. IVUS + Physiology Pro also leads on rating (5.0 vs 1.6) and monetization model (free vs paid). CathSource's advantage is update cadence (every 2 months vs every 7 months) and ratings volume (23 vs 6). 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.

IVUS + Physiology Pro holds the better App Store score, 5.0 against 1.6. Both are backed by a comparable volume of ratings — 23 and 6 respectively. Written reviews point the same way: 43% of CathSource's written reviews are positive against 100% of IVUS + Physiology Pro's.

CathSource ships an update every 2 months, IVUS + Physiology Pro every 7 months. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | CathSource | IVUS + Physiology Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/ivus-plus-physiology-pro/id1316589763/reviews)** |
| Number of ratings | **23** | 6 |
| Positive reviews | 42.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 104 MB |
| Requires iOS | 18.5 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Boston Scientific](https://appshunter.io/developer/469401132) |

## 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


### IVUS + Physiology Pro

[App page](https://appshunter.io/ios/app/ivus-plus-physiology-pro/id1316589763)

This app helps healthcare professionals master FFR waveform and IVUS image interpretation. It offers practice tools, real case examples, and video guides for detailed image analysis.

**Highlights:** FFR waveform interpretation guide, IVUS image interpretation guide, Practice IVUS measurements, Compare results with real cases, IVUS video clips

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

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

### Is IVUS + Physiology Pro free?

IVUS + Physiology Pro is free to download, with no in-app purchases.

### Which has better reviews, CathSource or IVUS + Physiology Pro?

IVUS + Physiology Pro is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while IVUS + Physiology Pro averages 5.0 from 6 ratings.

### Do CathSource or IVUS + Physiology Pro have ads?

Neither CathSource nor IVUS + Physiology Pro shows ads.

### Which is updated more often, CathSource or IVUS + Physiology Pro?

CathSource ships an update every 2 months, and IVUS + Physiology Pro every 7 months. Most recently, CathSource was updated on September 18, 2026 and IVUS + Physiology Pro on September 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.*