# arrhythmia vs Clinical ECG Interpretation

The clearest difference is price: arrhythmia at Free against Clinical ECG Interpretation's $1.99. arrhythmia also leads on update cadence (every 3 weeks vs every 6 months). Clinical ECG Interpretation's advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 17.6). On ads and device support there is nothing between them.

arrhythmia is free to download; Clinical ECG Interpretation costs $1.99 up front. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. Clinical ECG Interpretation asks for nothing beyond the download.

arrhythmia ships an update every 3 weeks, Clinical ECG Interpretation every 6 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | arrhythmia | Clinical ECG Interpretation |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews)** | — |
| Number of ratings | **113** | — |
| Positive reviews | 43.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | Subscription | — |
| Size | 159 MB | 64 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Abdulkarim Nasir](https://appshunter.io/developer/1463436050) |

## What reviewers say

### arrhythmia

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

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 |

**What reviewers like**

- 👍 Great study tool for EKGs
- 👍 Helpful for understanding EKGs
- 👍 Good for practicing rhythm recognition
- 👍 Interactive and colorful design
- 👍 Dynamic testing

**What reviewers complain about**

- 👎 Immediately asks for paid version
- 👎 Missing common and important rhythms
- 👎 Rhythms are unrealistic
- 👎 Cannot try before signing up
- 👎 Clunky and slow horizontal scrolling

**Reported bugs**

- App no longer works after iOS update
- App does not work on Apple Watch

**Requested features**

- Add more common and important rhythms (torsades, WPW, STEMI, accelerated/tachycardic idioventricular, WAP, MAT)
- Option to read as a 12-lead instead of a single rhythm line
- Add variations to rhythms
- Add Left Bundle Branch Block
- Add a 12-lead option


### Clinical ECG Interpretation

[App page](https://appshunter.io/ios/app/clinical-ecg-interpretation/id6608988850)

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

**In-app purchases:** none


## Frequently asked questions

### Is arrhythmia free?

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

### Is Clinical ECG Interpretation free?

Clinical ECG Interpretation costs $1.99, with no in-app purchases.

### Do arrhythmia or Clinical ECG Interpretation have ads?

Neither arrhythmia nor Clinical ECG Interpretation shows ads.

### Which is updated more often, arrhythmia or Clinical ECG Interpretation?

arrhythmia ships an update every 3 weeks, and Clinical ECG Interpretation every 6 months. Most recently, arrhythmia was updated on November 1, 2026 and Clinical ECG Interpretation on November 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.*