# arrhythmia vs ECG FlashCards

The clearest difference is review sentiment: arrhythmia at 45% against ECG FlashCards's 0%. arrhythmia also leads on rating (4.2 vs 3.5) and update cadence (every 3 weeks vs every 13 months). ECG FlashCards's advantage is in-app purchases (none vs 3) and iOS requirement (9.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. ECG FlashCards asks for nothing beyond the download.

arrhythmia holds the better App Store score, 4.2 against 3.5. That said, the two scores are not equally well evidenced: arrhythmia has 111 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 45% of arrhythmia's written reviews are positive against 0% of ECG FlashCards's.

arrhythmia ships an update every 3 weeks, ECG FlashCards every 13 months. The most recent releases landed on September 21, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | arrhythmia | ECG FlashCards |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (111 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/ecg-flashcards/id1281888288/reviews) |
| Number of ratings | **111** | 4 |
| Positive reviews | **45.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 13 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#188** | — |
| Size | 159 MB | 13 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Sree Hari Reddy Gadekallu](https://appshunter.io/developer/1281888287) |

## What reviewers say

### arrhythmia

[App page](https://appshunter.io/ios/app/arrhythmia/id996560473)

**Currently charting:** #188 Top Grossing · Medical (US App Store)

Practice interpreting EKGs in lead II with realistic simulations. Choose rhythms to study or test your knowledge in a game mode. Ideal for healthcare professionals to hone their diagnostic skills.

**Highlights:** EKG interpretation practice, Lead II simulation, Study Mode with rhythm selection, Game Mode for random rhythm identification, Customizable rhythm sets, Realistic rhythm variations

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |
| Unlock All Rhythms (One-time Purchase) | $4.99 | one-time |


### ECG FlashCards

[App page](https://appshunter.io/ios/app/ecg-flashcards/id1281888288)

This app provides quick reference ECGs of cardiac arrhythmias for medical professionals. It's designed for emergency situations or exam preparation, focusing on rhythm strips to avoid confusion. Users should have basic ECG knowledge.

**Highlights:** ECG reference for cardiac arrhythmias, Focus on rhythm strips (lead II), Covers conduction abnormalities, Ideal for emergencies, Useful for exam revision

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is arrhythmia free?

arrhythmia is free to download, with in-app purchases available.

### Is ECG FlashCards free?

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

### Which has better reviews, arrhythmia or ECG FlashCards?

arrhythmia is rated higher. arrhythmia averages 4.2 out of 5 from 111 ratings, while ECG FlashCards averages 3.5 from 4 ratings.

### Do arrhythmia or ECG FlashCards have ads?

Neither arrhythmia nor ECG FlashCards shows ads.

### Which is updated more often, arrhythmia or ECG FlashCards?

arrhythmia ships an update every 3 weeks, and ECG FlashCards every 13 months. Most recently, arrhythmia was updated on September 21, 2026 and ECG FlashCards on June 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.*