# ECG Pro for Doctors vs arrhythmia

The clearest difference is price: arrhythmia at Free against ECG Pro for Doctors's $9.99. arrhythmia also leads on chart position (#188 vs unranked). ECG Pro for Doctors's advantage is in-app purchases (none vs 3) and rating (4.6 vs 4.2). On ratings volume, update cadence, ads and device support there is nothing between them.

arrhythmia is free to download; ECG Pro for Doctors costs $9.99 up front. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. ECG Pro for Doctors asks for nothing beyond the download.

ECG Pro for Doctors holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 82 and 111 respectively. Written reviews point the same way: 58% of ECG Pro for Doctors's written reviews are positive against 45% of arrhythmia's.

ECG Pro for Doctors ships an update fortnightly, arrhythmia every 3 weeks. The most recent releases landed on September 23, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | ECG Pro for Doctors | arrhythmia |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.6 (82 ratings)](https://appshunter.io/ios/app/ecg-pro-for-doctors/id719883477/reviews)** | [4.2 (111 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) |
| Number of ratings | 82 | **111** |
| Positive reviews | **58.1% of reviews** | 45.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Paid** | Subscription |
| Best chart rank | — | **#188** |
| Size | 110 MB | 159 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, Mac |
| Age rating | 12+ | 17+ |
| Developer | [Heartworks Pty Ltd](https://appshunter.io/developer/1783326256) | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) |

## What reviewers say

### ECG Pro for Doctors

[App page](https://appshunter.io/ios/app/ecg-pro-for-doctors/id719883477)

This app offers a vast library of interpreted ECG cases to help medical professionals and students enhance their electrocardiogram reading skills. It provides interactive learning tools, detailed interpretations, and integrates with Apple Watch ECG recordings for a comprehensive learning experience.

**Highlights:** Thousands of interpreted ECG cases, Professional interpretation and measurement, Browse and search ECG cases by findings, Dynamic playback of ECG telemetry, Integration with Apple Watch ECG recordings, Bookmark and revisit cases

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is ECG Pro for Doctors free?

ECG Pro for Doctors costs $9.99, with no in-app purchases.

### Is arrhythmia free?

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

### Which has better reviews, ECG Pro for Doctors or arrhythmia?

ECG Pro for Doctors is rated higher. ECG Pro for Doctors averages 4.6 out of 5 from 82 ratings, while arrhythmia averages 4.2 from 111 ratings.

### Do ECG Pro for Doctors or arrhythmia have ads?

Neither ECG Pro for Doctors nor arrhythmia shows ads.

### Which is updated more often, ECG Pro for Doctors or arrhythmia?

ECG Pro for Doctors ships an update fortnightly, and arrhythmia every 3 weeks. Most recently, ECG Pro for Doctors was updated on September 23, 2026 and arrhythmia on September 21, 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.*