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
Read full description

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
Read full description

Every event. Every second. Code Timer is a timing and documentation companion for the adult resuscitation recorder. Start the code clock with one tap, capture events as they happen, and review a clear record afterward. RECORD AS YOU GO Log compressions and pauses, rhythm and pulse checks, shocks, medications, airway, vascular access, vitals, notes, ROSC, and re-arrest. Choose from three recorder layouts, with space for controls and recent events on iPad. KEEP TRACK OF TIME See elapsed code time, compression cycles, pauses, and time since the last logged epinephrine dose. Configure reminder intervals for your team's workflow. Enable system alarms and optional fallback notifications. Live Activities keep timing information accessible on supported devices. CORRECT AND REVIEW Undo a recent tap or edit an event's time and details. Corrections preserve the original entry in an audit trail. After a code, review key times, totals, a visual timeline, and documentation gaps. Missing entries are identified as not documented; they do not establish that an intervention did not happen. EXPORT FOR DOCUMENTATION Share a PDF code sheet, CSV spreadsheet, or plain text record. Print the PDF through the system share sheet or copy the record as text. Verify the information and transcribe it into your institution's official medical record. KEEP RECORDS ON YOUR DEVICE No account, ads, or analytics SDKs. Core recording and review work offline. Records are excluded from device backups. Optionally protect saved records with Face ID, Touch ID, or your device passcode, and choose automatic deletion after 7, 30, or 90 days. OPTIONAL ON-DEVICE HIGHLIGHTS On compatible Apple Intelligence devices, an optional experiment selects highlights from app-calculated debrief facts. Free-text notes and custom names are excluded. Highlights are temporary and never enter the saved record or exports. The full calculated debrief works without Apple Intelligence. Code Timer records events and measures elapsed time. It does not recommend treatment, calculate doses, replace clinical judgment or local protocols, or serve as the official medical record. Debriefs are not clinical assessments or validated evaluations of care quality. Do not enter patient identifiers. Rehearse alerts on your actual device before use. Permissions, system settings, battery, and device state can affect delivery. Fallback notification sounds respect Silent mode. Keep your usual clock and documentation process available.

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 update cadence (every 3 weeks vs every 16 months) and 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 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 16 months. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 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 reviews43.9% of reviews—
Number of ratings111 — better2
Update frequencyEvery 3 weeks — betterEvery 16 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.6 — better26.0
Further details — not scored
Size159 MB4 MB
Age rating17+17+
DeveloperSingle Sail Software, LLCZachery Gentry

Customer experience

arrhythmia

All ratings111 ratings
Positive80.2%
Neutral4.5%
Negative15.3%
Written reviews41 reviews
Positive43.9%
Neutral7.3%
Negative48.8%

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 16 months. Most recently, arrhythmia was updated on October 13, 2026 and Code Timer on October 6, 2026.

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