# arrhythmia vs ROCC EMS Guidelines

The clearest difference is in-app purchases: ROCC EMS Guidelines at none against arrhythmia's 3. ROCC EMS Guidelines also leads on iOS requirement (15.0 vs 17.6). arrhythmia's advantage is update cadence (every 3 weeks vs every 4 months) and ratings volume (111 vs 6). On price, rating, 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. ROCC EMS Guidelines asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.2 for arrhythmia against 4.3 for ROCC EMS Guidelines. That said, the two scores are not equally well evidenced: arrhythmia has 111 ratings behind it against 6, so its average is the more settled of the two.

arrhythmia ships an update every 3 weeks, ROCC EMS Guidelines every 4 months. The most recent releases landed on September 21, 2026 and July 31, 2026 respectively.

## The numbers

| Metric | arrhythmia | ROCC EMS Guidelines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (111 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/rocc-ems-guidelines/id6456484392/reviews)** |
| Number of ratings | **111** | 6 |
| Positive reviews | 45.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#188** | — |
| Size | 159 MB | 54 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Acid Remap LLC](https://appshunter.io/developer/323130617) |

## 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 |


### ROCC EMS Guidelines

[App page](https://appshunter.io/ios/app/rocc-ems-guidelines/id6456484392)

Access essential medical protocols and supporting documents offline. Quickly search and find information with indexed lookup and customizable notes. Stay updated with regular content revisions.

**Highlights:** Offline access to protocols, Quick indexed lookup, Search titles and text, Favorites tab, Customizable notes, Regular updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is arrhythmia free?

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

### Is ROCC EMS Guidelines free?

ROCC EMS Guidelines is free to download, with no in-app purchases.

### Which has better reviews, arrhythmia or ROCC EMS Guidelines?

ROCC EMS Guidelines is rated higher. arrhythmia averages 4.2 out of 5 from 111 ratings, while ROCC EMS Guidelines averages 4.3 from 6 ratings.

### Do arrhythmia or ROCC EMS Guidelines have ads?

Neither arrhythmia nor ROCC EMS Guidelines shows ads.

### Which is updated more often, arrhythmia or ROCC EMS Guidelines?

arrhythmia ships an update every 3 weeks, and ROCC EMS Guidelines every 4 months. Most recently, arrhythmia was updated on September 21, 2026 and ROCC EMS Guidelines on July 31, 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.*