# NRMCA Protocols vs arrhythmia

The clearest difference is rating: NRMCA Protocols at 5.0 against arrhythmia's 4.2. NRMCA Protocols also leads on in-app purchases (none vs 3) and iOS requirement (15.0 vs 17.6). arrhythmia's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (111 vs 1). 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. NRMCA Protocols asks for nothing beyond the download.

NRMCA Protocols holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: arrhythmia has 111 ratings behind it against 1, so its average is the more settled of the two.

NRMCA Protocols ships an update every 5 months, arrhythmia every 3 weeks. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | NRMCA Protocols | arrhythmia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nrmca-protocols/id560844401/reviews)** | [4.2 (111 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) |
| Number of ratings | 1 | **111** |
| Positive reviews | — | 43.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Subscription |
| Size | 28 MB | 159 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 17+ |
| Developer | [Acid Remap LLC](https://appshunter.io/developer/323130617) | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) |

## What reviewers say

### NRMCA Protocols

[App page](https://appshunter.io/ios/app/nrmca-protocols/id560844401)

Access Northwest Regional Medical Control Authority protocols quickly and offline. Search titles and text, save favorites, and customize hospital contacts and notes. Stay updated with the latest protocols.

**Highlights:** Offline protocol access, Indexed lookup, Search titles and text, Favorites tab, Customizable hospital info, Customizable notes

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is NRMCA Protocols free?

NRMCA Protocols is free to download, with no in-app purchases.

### Is arrhythmia free?

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

### Which has better reviews, NRMCA Protocols or arrhythmia?

NRMCA Protocols is rated higher. NRMCA Protocols averages 5.0 out of 5 from 1 ratings, while arrhythmia averages 4.2 from 111 ratings.

### Do NRMCA Protocols or arrhythmia have ads?

Neither NRMCA Protocols nor arrhythmia shows ads.

### Which is updated more often, NRMCA Protocols or arrhythmia?

NRMCA Protocols ships an update every 5 months, and arrhythmia every 3 weeks. Most recently, NRMCA Protocols was updated on October 3, 2026 and arrhythmia on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*