# ACLS Rhythms and Quiz vs arrhythmia

The clearest difference is price: arrhythmia at Free against ACLS Rhythms and Quiz's $9.99. ACLS Rhythms and Quiz's advantage is rating (4.7 vs 4.1) and in-app purchases (none vs 3). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

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

ACLS Rhythms and Quiz holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 201 and 113 respectively. Written reviews complicate that: 39% of ACLS Rhythms and Quiz's written reviews are positive against 44% of arrhythmia's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on November 1, 2026.

## The numbers

| Metric | ACLS Rhythms and Quiz | arrhythmia |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.7 (201 ratings)](https://appshunter.io/ios/app/acls-rhythms-and-quiz/id514350557/reviews)** | [4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) |
| Number of ratings | **201** | 113 |
| Positive reviews | 39.3% of reviews | **43.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Paid** | Subscription |
| Size | 204 MB | 159 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | +17 | 17+ |
| Developer | [iAnesthesia LLC](https://appshunter.io/developer/293134324) | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) |

## What reviewers say

### ACLS Rhythms and Quiz

[App page](https://appshunter.io/ios/app/acls-rhythms-and-quiz/id514350557)

This app helps healthcare professionals recognize and understand ACLS arrhythmias through dynamic movies and quizzes. It provides essential information for managing cardiac arrest events and preparing for ACLS renewal exams.

**Highlights:** Dynamic movies simulating clinical practice, Cardioversion movies with post-cardioversion scenarios, Real-life rhythms with monitor alarms and sounds, Comprehensive ACLS Rhythms Exam, Details on ACLS medications, Guidelines for adult cardiac arrest management

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great app for medical professionals
- 👍 Helpful for ACLS class review
- 👍 Drug section is very helpful
- 👍 Good for nursing students
- 👍 Organized and informative

**What reviewers complain about**

- 🐛 No 'next question' button in quizzes
- 🐛 Spelling errors
- 🐛 App needs updating for compatibility
- 🐛 Crashes frequently
- 🐛 Expensive for limited functionality

**Reported bugs**

- No 'next question' button
- Spelling errors
- Compatibility issues with newer iOS versions
- Frequent crashes
- App stops working after download

**Requested features**

- Add a 'next question' button for quizzes
- Fix spelling errors
- Update the app for current iOS compatibility
- Add buttons for describing characteristics of each rhythm
- More detailed drug information (contraindications, dosing)


### 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


## Frequently asked questions

### Is ACLS Rhythms and Quiz free?

ACLS Rhythms and Quiz 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, ACLS Rhythms and Quiz or arrhythmia?

ACLS Rhythms and Quiz is rated higher. ACLS Rhythms and Quiz averages 4.7 out of 5 from 201 ratings, while arrhythmia averages 4.1 from 113 ratings.

### Do ACLS Rhythms and Quiz or arrhythmia have ads?

Neither ACLS Rhythms and Quiz nor arrhythmia shows ads.

### Which is updated more often, ACLS Rhythms and Quiz or arrhythmia?

ACLS Rhythms and Quiz ships an update every 3 weeks, and arrhythmia every 3 weeks. Most recently, ACLS Rhythms and Quiz was updated on November 1, 2026 and arrhythmia on November 1, 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.*