Comparison

arrhythmia vs Code Timer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

arrhythmia

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
Currently charting
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Practice reading EKGs in lead II Basic EKG interpretation is more accurately described as an intermediate level skill that takes time, practice and refreshing. Whether you are a doctor, nurse, EMT or tech your ability to read and pickup on basic EKG changes in real time is essential. Practice with an app that actually looks like what you see at work. Use the app’s ‘Study Mode’ to choose one or multiple rhythms to view and compare. A brief description of each rhythm is provided, you can also pause and restart rhythms. Delete and add specific rhythms as desired. Rates, amplitudes and widths of the rhythms are dynamically set which provides for a more realistic simulation and variation within each type of rhythm. Use the app’s ‘Game Mode’ to challenge yourself to identify rhythms presented randomly in lead II. If desired, you can also custom specify which rhythms to include in the game. Access to Study Mode and Game Mode requires a subscription via in-app purchase. Please Read: The purpose of this app is not to teach basic EKG interpretation but rather to practice basic EKG interpretation. If you don’t know basic EKG interpretation seek out additional resources such as classes, books, online materials and mentors to learn more and further your understanding. Note: The cardiac rhythms presented by the app are simulated approximations. There is NO guarantee to the accuracy of rhythms presented. While accuracy is not guaranteed it is a goal. Please report errors, suggestions or general feedback to: feedback@arrhythmiaApp.com. Arrhythmia uses the standard Apple Terms of Use End User License Agreement (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula

About

Code Timer

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
Currently charting
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Welcome to Code Timer Your indispensable companion in critical moments. Designed for first responders, Code Timer offers a seamless and efficient way to track time-sensitive events during emergencies. Why Choose Code Timer? Intuitive Timing: Simple yet powerful, our app allows you to effortlessly start, stop, and monitor critical timelines with just a few taps. Reliability When It Matters: Built for high-stress situations, Code Timer ensures accuracy and dependability when every second counts. Enhance Team Coordination: Streamline communication and enhance coordination among team members during crucial operations. No Data Collection: Your privacy is paramount. Code Timer operates without collecting any personal or sensitive information. Key Features: Event Logging and History: Keep track of key events and times for post-operation review and training and retain the history on your device. User-Friendly Interface: Easy-to-navigate interface designed for quick access in urgent situations. Offline Functionality: Fully operational without internet connectivity, ensuring reliability in all conditions. Who Can Benefit? Nurses EMTs Paramedics Firefighters Emergency Room Professionals And any first responder who values efficiency and precision in their life-saving work. Join the Community of First Responders who trust Code Timer! Download now and elevate your emergency response capabilities. We're committed to continuously improving and tailoring Code Timer to your needs. Your feedback is always welcome and valued.

Screenshots

arrhythmia4 screens
Code Timer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 4 level
arrhythmia versus Code Timer: the parameters behind the verdict, then further details
ParameterarrhythmiaCode Timer
PriceFree — better$3.99
Rating4.2 (111 ratings)5.0 (2 ratings) — better
Positive reviews45.0% of reviews—
Number of ratings111 — better2
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionPaid — better
Best chart rank#188 — better#195
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS17.612.0 — better
Further details — not scored
Size159 MB25 MB
Age rating17+4+
DeveloperSingle Sail Software, LLCZachery Gentry

Customer experience

arrhythmia

All ratings111 ratings
Positive80.2%
Neutral4.5%
Negative15.3%
Written reviews40 reviews
Positive45.0%
Neutral7.5%
Negative47.5%

Code Timer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

arrhythmia

Subscriptions2
  • Monthly7 Days trial$2.991 Month
  • Yearly7 Days trial$19.991 Year
One-time1
  • Unlock All Rhythms (One-time Purchase)$4.99
None

Code Timer

No in-app purchases

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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