# ECGsource vs IVUSAID

The clearest difference is price: IVUSAID at Free against ECGsource's $0.99. IVUSAID also leads on rating (5.0 vs 3.0). ECGsource's advantage is ads (none vs shown) and update cadence (every 4 months vs every 18 months). On in-app purchases and device support there is nothing between them.

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

IVUSAID holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: ECGsource has 8 ratings behind it against 1, so its average is the more settled of the two.

ECGsource ships an update every 4 months, IVUSAID every 18 months. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | ECGsource | IVUSAID |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.0 (8 ratings)](https://appshunter.io/ios/app/ecgsource/id377139093/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ivusaid/id6447531663/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 18 months |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#39** | — |
| Size | 349 MB | 80 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [ECGsource LLC](https://appshunter.io/developer/377139096) | [Cardiology Apps LLC](https://appshunter.io/developer/1639925847) |

## What reviewers say

### ECGsource

[App page](https://appshunter.io/ios/app/ecgsource/id377139093)

**Currently charting:** #39 Top Paid · Medical (US App Store)

This medical education app provides a searchable reference for ECG diagnoses and criteria, sample ECG images, and video tutorials. It's designed for medical students and professionals to aid in electrocardiogram interpretation and board review.

**Highlights:** Searchable ECG diagnoses and criteria, High-resolution sample ECG images, ECG quiz (demo), Video tutorials for beginners, Board review preparation

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

**In-app purchases:** none


### IVUSAID

[App page](https://appshunter.io/ios/app/ivusaid/id6447531663)

This free educational app teaches medical professionals how to use intravascular ultrasound (IVUS) for PCI guidance. It features interactive lessons, image interpretation tools, and complex case studies to overcome barriers to IVUS adoption.

**Highlights:** IVUS principles and image acquisition, Image interpretation with videos and descriptions, Complex coronary case studies, Interactive quiz section with explanations, PCI guidance for stent sizing and optimization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ECGsource free?

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

### Is IVUSAID free?

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

### Which has better reviews, ECGsource or IVUSAID?

IVUSAID is rated higher. ECGsource averages 3.0 out of 5 from 8 ratings, while IVUSAID averages 5.0 from 1 ratings.

### Do ECGsource or IVUSAID have ads?

IVUSAID shows ads; ECGsource does not.

### Which is updated more often, ECGsource or IVUSAID?

ECGsource ships an update every 4 months, and IVUSAID every 18 months. Most recently, ECGsource was updated on October 7, 2026 and IVUSAID on October 2, 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.*