# CathSource vs EchoLab

The clearest difference is price: CathSource at Free against EchoLab's $4.99. CathSource also leads on update cadence (every 2 months vs every 5 months). EchoLab's advantage is review sentiment (75% vs 38%). On ads, in-app purchases, monetization model and device support there is nothing between them.

CathSource is free to download; EchoLab costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CathSource ships an update every 2 months, EchoLab every 5 months. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CathSource | EchoLab |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 38.5% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Paid | Paid |
| Size | 79 MB | 46 MB |
| Requires iOS | **18.5** | 18.6 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 12+ | 17+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Medical Appware, LLC](https://appshunter.io/developer/427460808) |

## 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


### EchoLab

[App page](https://appshunter.io/ios/app/echolab/id427460805)

This app provides a comprehensive framework for teaching and performing quantitative echocardiography. It offers a wide array of calculations, graphical displays of equations, and integrates current guidelines for a cohesive overview of cardiac ultrasound analysis. A companion Apple Watch app is also included for on-the-go reference.

**Highlights:** Quantitative echocardiography calculations, Integration of ASE/EACVI guidelines, Analytic Engine for synthesized results, Companion Apple Watch app, Graphical display of equations, Medical literature references with hyperlinks, Wide array of echocardiographic calculations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

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

### Is EchoLab free?

EchoLab costs $4.99, with no in-app purchases.

### Do CathSource or EchoLab have ads?

Neither CathSource nor EchoLab shows ads.

### Which is updated more often, CathSource or EchoLab?

CathSource ships an update every 2 months, and EchoLab every 5 months. Most recently, CathSource was updated on October 12, 2026 and EchoLab on October 8, 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.*