Comparison

LC vs arrhythmia

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

Head to head
About

LC

Access your existing study programs with interactive tools like flashcards, practice questions, and exams. Engage with fellow students on a study wall and stay updated with a custom news feed. Progress syncs across devices.

Highlights
  • Study cards
  • Practice review questions
  • Practice examinations
  • Detailed rationale answers
  • Study wall for peer communication
  • Cross-device progress syncing
  • Custom EMS news feed
Features
Read full description

This app is designed to give existing LC-Ready users access to their programs via this fully functional app. You will be able to use study cards, practice with review questions, take practice examinations, and see our industry-leading detailed rationale answers all within the LC-Ready app. The app also provides full access to our unique study wall feature which gives students the ability to communicate and study together on the fly. User’s progress history and mastered items are carried seamlessly between this app and other devices used for study. If you take a practice exam on your phone, you will also see the results on your computer. As a special feature available only on the LC-Ready app, users can view a custom news feed from EMS internet leader EMS1.com targeted specially for EMS students and practitioners.  Keeping up with the latest news and trends is a vital part of an EMS provider’s responsibility. The LC-Ready app makes it that much easier. NOTE: This app provides functionality only to users of Limmer Creative’s LC-Ready programs. Users of apps purchased on the iTunes store will continue to access their programs through those individual apps.

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

Screenshots

LC4 screens
arrhythmia4 screens

Verdict

The call

The clearest difference is rating: arrhythmia at 4.2 against LC's 3.7. arrhythmia also leads on update cadence (every 3 weeks vs every 43 months). LC's advantage is in-app purchases (none vs 3) and iOS requirement (9.0 vs 17.6). On price, review sentiment, ratings volume and ads 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

Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. LC asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

arrhythmia holds the better App Store score, 4.2 against 3.7. Both are backed by a comparable volume of ratings — 41 and 111 respectively. Written reviews split almost evenly too, at 44% and 44% positive.

UpkeepUpdate frequency

LC ships an update every 43 months, arrhythmia every 3 weeks. The most recent releases landed on October 15, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
LC versus arrhythmia: the parameters behind the verdict, then further details
ParameterLCarrhythmia
PriceFreeFree
Rating3.7 (41 ratings)4.2 (111 ratings) — better
Positive reviews43.8% of reviews43.9% of reviews — better
Number of ratings41111 — better
Update frequencyEvery 43 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS9.0 — better17.6
Further details — not scored
Size49 MB159 MB
Age rating17+17+
DeveloperLimmer CreativeSingle Sail Software, LLC

Customer experience

LC

All ratings41 ratings
Positive58.5%
Neutral14.6%
Negative26.8%
Written reviews16 reviews
Positive43.8%
Neutral31.3%
Negative25.0%

arrhythmia

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

In-app purchases

None

LC

No 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

Questions

Is LC free?
LC is free to download, with no in-app purchases.
Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Which has better reviews, LC or arrhythmia?
arrhythmia is rated higher. LC averages 3.7 out of 5 from 41 ratings, while arrhythmia averages 4.2 from 111 ratings.
Do LC or arrhythmia have ads?
Neither LC nor arrhythmia shows ads.
Which is updated more often, LC or arrhythmia?
LC ships an update every 43 months, and arrhythmia every 3 weeks. Most recently, LC was updated on October 15, 2026 and arrhythmia on October 13, 2026.

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