# CathSource vs EPLog

The clearest difference is price: CathSource at Free against EPLog's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

CathSource is free to download; EPLog costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CathSource ships an update every 2 months, EPLog every 4 months. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | CathSource | EPLog |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 42.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Paid | — |
| Size | 79 MB | 3 MB |
| Requires iOS | 18.5 | **18.1** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Matthew Segar](https://appshunter.io/developer/1886591457) |

## 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


### EPLog

[App page](https://appshunter.io/ios/app/eplog/id6760868000)

**In-app purchases:** none


## Frequently asked questions

### Is CathSource free?

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

### Is EPLog free?

EPLog costs $0.99, with no in-app purchases.

### Do CathSource or EPLog have ads?

Neither CathSource nor EPLog shows ads.

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

CathSource ships an update every 2 months, and EPLog every 4 months. Most recently, CathSource was updated on September 18, 2026 and EPLog on September 15, 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.*