# arrhythmia vs Code Timer

The clearest difference is price: arrhythmia at Free against Code Timer's $3.99. arrhythmia also leads on ratings volume (111 vs 2). Code Timer's advantage is rating (5.0 vs 4.2) and in-app purchases (none vs 3). On ads, chart position and device support there is nothing between them.

arrhythmia is free to download; Code Timer costs $3.99 up front. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. Code Timer asks for nothing beyond the download.

Code Timer 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 2, so its average is the more settled of the two.

arrhythmia ships an update every 3 weeks, Code Timer every 2 days. The most recent releases landed on September 21, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | arrhythmia | Code Timer |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.2 (111 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/code-timer-er-aid/id6445837129/reviews)** |
| Number of ratings | **111** | 2 |
| Positive reviews | 45.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Subscription | **Paid** |
| Best chart rank | **#188** | #195 |
| Size | 159 MB | 25 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Zachery Gentry](https://appshunter.io/developer/1638986232) |

## 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 |


### Code Timer

[App page](https://appshunter.io/ios/app/code-timer-er-aid/id6445837129)

**Currently charting:** #195 Top Paid · Medical (US App Store)

This application helps first responders track time-sensitive events during emergencies. It offers intuitive timing, event logging, and offline functionality for enhanced coordination and post-operation review. Designed for reliability when every second counts.

**Highlights:** Intuitive event timing, Event logging and history, User-friendly interface, Offline functionality, Enhanced team coordination, No personal data collection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is arrhythmia free?

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

### Is Code Timer free?

Code Timer costs $3.99, with no in-app purchases.

### Which has better reviews, arrhythmia or Code Timer?

Code Timer is rated higher. arrhythmia averages 4.2 out of 5 from 111 ratings, while Code Timer averages 5.0 from 2 ratings.

### Do arrhythmia or Code Timer have ads?

Neither arrhythmia nor Code Timer shows ads.

### Which is updated more often, arrhythmia or Code Timer?

arrhythmia ships an update every 3 weeks, and Code Timer every 2 days. Most recently, arrhythmia was updated on September 21, 2026 and Code Timer on September 19, 2026.

### Which is more popular, arrhythmia or Code Timer?

arrhythmia currently peaks at #188 in the App Store charts, and Code Timer at #195. Chart position reflects recent download velocity rather than total install base.

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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.*