# arrhythmia vs EKGDX

The clearest difference is review sentiment: EKGDX at 89% against arrhythmia's 44%. EKGDX also leads on rating (4.5 vs 4.1) and iOS requirement (12.0 vs 17.6). arrhythmia's advantage is update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month and EKGDX sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

EKGDX holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 113 and 39 respectively. Written reviews point the same way: 44% of arrhythmia's written reviews are positive against 89% of EKGDX's.

arrhythmia ships an update every 3 weeks, EKGDX every 2 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | arrhythmia | EKGDX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) | **[4.5 (39 ratings)](https://appshunter.io/ios/app/ekgdx/id1578765225/reviews)** |
| Number of ratings | **113** | 39 |
| Positive reviews | 43.9% of reviews | **88.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Subscription | Subscription |
| Size | 159 MB | 21 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Albert Roig](https://appshunter.io/developer/1054580858) |

## 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


### EKGDX

[App page](https://appshunter.io/ios/app/ekgdx/id1578765225)

This comprehensive educational platform offers extensive resources for learning electrocardiogram interpretation. It includes detailed criteria, guidelines, cardiac trials, and a vast gallery of multimedia content. Practice with various EKG cases and track your progress with an analytical dashboard.

**Highlights:** EKG Criteria and Guidelines, Extensive Multimedia Gallery, EKG Practice Qbanks, Volume II EKG Challenges, Learning Progress Dashboard, Cardiac Trials and References

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | per month |
| Boards - Final Test 2 | $5.99 | one-time |
| Boards - Final Test 1 | $7.99 | one-time |
| Boards - Final Test 2 | $7.99 | one-time |
| Boards | $7.99 | one-time |


## Frequently asked questions

### Is arrhythmia free?

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

### Is EKGDX free?

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

### Which has better reviews, arrhythmia or EKGDX?

EKGDX is rated higher. arrhythmia averages 4.1 out of 5 from 113 ratings, while EKGDX averages 4.5 from 39 ratings.

### Do arrhythmia or EKGDX have ads?

Neither arrhythmia nor EKGDX shows ads.

### Which is updated more often, arrhythmia or EKGDX?

arrhythmia ships an update every 3 weeks, and EKGDX every 2 months. Most recently, arrhythmia was updated on October 29, 2026 and EKGDX on October 30, 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.*