# CathSource vs Valve In Valve

The clearest difference is rating: Valve In Valve at 4.6 against CathSource's 1.6. Valve In Valve also leads on monetization model (free vs paid) and review sentiment (71% vs 38%). 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.

Valve In Valve holds the better App Store score, 4.6 against 1.6. Both are backed by a comparable volume of ratings — 23 and 10 respectively. Written reviews point the same way: 38% of CathSource's written reviews are positive against 71% of Valve In Valve's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | CathSource | Valve In Valve |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[4.6 (10 ratings)](https://appshunter.io/ios/app/valve-in-valve/id655683780/reviews)** |
| Number of ratings | **23** | 10 |
| Positive reviews | 38.5% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 41 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


### Valve In Valve

[App page](https://appshunter.io/ios/app/valve-in-valve/id655683780)

This app provides clinicians with quick, clear, and concise information on heart valves and Valve in Valve therapy. It guides users through surgical and TAVR valve design, helping to plan and perform procedures by identifying surgical valves, selecting correct TAVR valve sizes, and determining optimal placement. The app offers offline access to vital information, enhancing understanding and improving patient outcomes.

**Highlights:** Heart valve design information, Valve in Valve therapy guide, Surgical and TAVR valve sizing, Image-based placement guidance, Video examples of valve placement, Offline information access, Stepped valve identification process

**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 Valve In Valve free?

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

### Which has better reviews, CathSource or Valve In Valve?

Valve In Valve is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while Valve In Valve averages 4.6 from 10 ratings.

### Do CathSource or Valve In Valve have ads?

Neither CathSource nor Valve In Valve shows ads.

### Which is updated more often, CathSource or Valve In Valve?

CathSource ships an update every 2 months, and Valve In Valve every 2 months. Most recently, CathSource was updated on October 12, 2026 and Valve In Valve on September 24, 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.*