# ECGsource vs MCSAID

The clearest difference is price: MCSAID at Free against ECGsource's $0.99. ECGsource's advantage is update cadence (every 4 months vs every 40 months) and chart position (#42 vs unranked). On ads, in-app purchases and device support there is nothing between them.

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

ECGsource ships an update every 4 months, MCSAID every 40 months. The most recent releases landed on September 21, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | ECGsource | MCSAID |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.0 (8 ratings)](https://appshunter.io/ios/app/ecgsource/id377139093/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 40 months |
| Monetization | Paid | — |
| Best chart rank | **#42** | — |
| Size | 349 MB | 46 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, 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:** #42 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


### MCSAID

[App page](https://appshunter.io/ios/app/mcsaid/id6443740248)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ECGsource free?

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

### Is MCSAID free?

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

### Do ECGsource or MCSAID have ads?

Neither ECGsource nor MCSAID shows ads.

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

ECGsource ships an update every 4 months, and MCSAID every 40 months. Most recently, ECGsource was updated on September 21, 2026 and MCSAID on September 12, 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.*