# arrhythmia vs Muru

The clearest difference is review sentiment: Muru at 96% against arrhythmia's 44%. Muru also leads on rating (4.8 vs 4.1) and in-app purchases (none vs 3). arrhythmia's advantage is ads (none vs shown). On price, ratings volume, update cadence 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. Muru asks for nothing beyond the download.

Muru holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 113 and 132 respectively. Written reviews point the same way: 44% of arrhythmia's written reviews are positive against 96% of Muru's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | arrhythmia | Muru |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) | **[4.8 (132 ratings)](https://appshunter.io/ios/app/muru/id1409950908/reviews)** |
| Number of ratings | 113 | **132** |
| Positive reviews | 43.9% of reviews | **96.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 159 MB | 61 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Muru, Inc.](https://appshunter.io/developer/1409950907) |

## 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


### Muru

[App page](https://appshunter.io/ios/app/muru/id1409950908)

This app provides essential tools for medical professionals during emergencies. It offers quick access to protocols, medication dosages, and transport decisions. Users can also find detailed information on equipment and medications, with all data sourced from authorized medical professionals.

**Highlights:** Protocol Finder, Dosing Information, Medication Math Calculator, Transportation Decision Support, Equipment & Medication Details, Source Verification

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and navigate
- 🚀 Quick access to information
- 💡 Comprehensive protocol information
- 💡 Accurate medication dosages
- 💡 Location sharing for hospitals

**What reviewers complain about**

- 🐛 Tiny print on cell phone
- 🐛 App freezes sometimes
- 🐛 Needs work on text wrapping when zoomed

**Reported bugs**

- Protocol pages display as full page with tiny print
- Text does not wrap when zoomed on protocol pages
- App freezes at times
- App goes to a 'cyber timeout room'

**Requested features**

- Better AI assistant for broader queries
- Integrate Siri


## Frequently asked questions

### Is arrhythmia free?

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

### Is Muru free?

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

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

Muru is rated higher. arrhythmia averages 4.1 out of 5 from 113 ratings, while Muru averages 4.8 from 132 ratings.

### Do arrhythmia or Muru have ads?

Muru shows ads; arrhythmia does not.

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

arrhythmia ships an update every 3 weeks, and Muru every 3 weeks. Most recently, arrhythmia was updated on November 1, 2026 and Muru on November 2, 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.*