# CathSource vs RCIS Study Guide

The clearest difference is price: CathSource at Free against RCIS Study Guide's $9.99. RCIS Study Guide's advantage is rating (4.7 vs 1.6) and update cadence (fortnightly vs every 2 months). On review sentiment, ads, in-app purchases and device support there is nothing between them.

CathSource is free to download; RCIS Study Guide costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RCIS Study Guide holds the better App Store score, 4.7 against 1.6. That said, the two scores are not equally well evidenced: RCIS Study Guide has 451 ratings behind it against 23, so its average is the more settled of the two. Written reviews complicate that: 43% of CathSource's written reviews are positive against 35% of RCIS Study Guide's, so the app with the better star average is not the one people write more warmly about.

CathSource ships an update every 2 months, RCIS Study Guide fortnightly. The most recent releases landed on September 18, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | CathSource | RCIS Study Guide |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [1.6 (23 ratings)](https://appshunter.io/ios/app/cathsource/id420847275/reviews) | **[4.7 (451 ratings)](https://appshunter.io/ios/app/rcis-study-guide/id1358421632/reviews)** |
| Number of ratings | 23 | **451** |
| Positive reviews | **42.9% of reviews** | 35.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | **Free** |
| Best chart rank | — | **#76** |
| Size | 79 MB | 96 MB |
| Requires iOS | 18.5 | **11.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Jared Lapointe](https://appshunter.io/developer/1358421631) |

## 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


### RCIS Study Guide

[App page](https://appshunter.io/ios/app/rcis-study-guide/id1358421632)

**Currently charting:** #76 Top Paid · Medical (US App Store)

Prepare for the RCIS exam with a comprehensive study tool. Access hundreds of practice questions covering cardiology topics, review study materials, and analyze your performance with detailed results and customizable exam lengths. Includes image recognition practice with angiograms and waveforms.

**Highlights:** Hundreds of cardiology practice questions, Review study materials, Image recognition with angiograms/waveforms, Timed practice exams, Immediate feedback on answers, Exam results and score tracking, Multiple exam lengths

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great tool for exam preparation
- 🖼️ Lots of good pictures/angiograms
- 💡 Helpful supplement to study material
- ✨ Nice looking app with playful animations
- 💯 Questions are like exam questions

**What reviewers complain about**

- ❓ No explanations for wrong answers
- 📚 Lacks information in study material
- ↩️ Unable to go back to questions
- 📉 Repetitive questions
- 💰 Not worth the price for some users

**Reported bugs**

- App crashes on newer iOS versions
- Study portion is a joke

**Requested features**

- Add explanations for wrong answers
- More information in study material
- Ability to review missed questions
- Option to test on specific subjects
- More questions in general


## Frequently asked questions

### Is CathSource free?

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

### Is RCIS Study Guide free?

RCIS Study Guide costs $9.99, with no in-app purchases.

### Which has better reviews, CathSource or RCIS Study Guide?

RCIS Study Guide is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while RCIS Study Guide averages 4.7 from 451 ratings.

### Do CathSource or RCIS Study Guide have ads?

Neither CathSource nor RCIS Study Guide shows ads.

### Which is updated more often, CathSource or RCIS Study Guide?

CathSource ships an update every 2 months, and RCIS Study Guide fortnightly. Most recently, CathSource was updated on September 18, 2026 and RCIS Study Guide on October 4, 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.*