ECG Books vs arrhythmia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ECG Books
Access a vast library of real-world ECG recordings demonstrating various cardiac abnormalities. Learn to interpret ECG findings with concise explanations and detailed case studies. Practice with over 1000 abnormal ECG cases in movie or report modes.
- View real-time ECG recordings
- Concise explanations of abnormalities
- 1000+ abnormal ECG cases
- Movie mode with heartbeat sounds
- Report mode for measurement and sharing
- Detailed information on causes, diagnosis, and treatment
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Medical Editor's Review: This app allows you to view ECG recordings in real time demonstrating a wide range of different cardiac abnormalities. You can also read concise explanations of how each abnormality manifests itself in ECG findings. The ability to view these ECG recordings as often as desired makes this a valuable tool for mastering the nuances of ECG interpretation. Customer reviews: These apps have really been improving since recent updates. They are not designed as standalone tutorials, but rather serve as an excellent and extensive library of realistic example cases that illustrate principles of ECG interpretation, from the simplest to the very complex, and from the common to the very rare. Recent updates have expanded to include basic information on elements of ECG interpretation and cardiac physiology, which has added a new layer of depth to an already great collection of apps. Please, keep up the excellent work!" "A best and easy ecg interpretor which was very useful thanx ecg book...enjoy and try to learn" "Great app for practicing strips!!! Helps with my new nursing career!!!" "Great for anyone learning how to interpret EKG rhythms. I'm a paramedic student and I've greatly benefitted from this app." "I'm a nursing student and our school has poor lecturers so we are teaching ourselves everything. This has helped immensely in my advanced med surg class." ======================================================== ECG Books is a large database of ECG abnormality. It provides 1000+ abnormal ECG cases from real world patients to help illustrate the most important ECG findings. Each book talks about one finding, with detailed information including Causes / Characteristics / Signs / Diagnosis / Treatment The 1000+ abnormal ECG cases are provided in 2 modes: Movie mode and Report mode [Movie Mode] You play each case like watching it on monitor with beep sound of each heartbeat. [Report Mode] You view cases in all 10 seconds long, measure, share or print [Books Published] 1. Atrial Fibrillation Book 2. Atrial Flutter Book 3. PVC Book 4. PAC Book 5. RBBB Book (IRBBB and CRBBB) 6. U Wave Book 7. Sinus Bradycardia & Tachycardia Book 8. Early Repolarization Book 9. Fusion Beats Book 10. Pulmonary Heart Disease Book 11. Second-degree AV block Book 12. T Wave Inversion Book 13. Clockwise Rotation Book 14. Type A Pre-excitation Book 15. Quadrigeminy Book 16. Trigeminy Book 17. Pacemark Rhythm Book (DDD / VVI) 18. SVT Book 19. SI QIII TIII Book 20. Long QT Prolongation Book 21. Poor R-Wave Progression Book 22. Type A Pre-Excitation Book 23. IVCD Book 24. Escape Rhythm Book 25. Left Anterior Fascicular Block Book 26. Clockwise & Counterclockwise Rotation Book 27. T Wave Inversion Book 28. First-degree Atrioventricular Book 29. WAP Book 30. Left Atrial Enlargement Book 31. LAD & RAD Book 32. AF With RVR Book 33. Pulmonary Heart Disease Book 34. Fusion Beats Book 35. ST Elevation Book 36. Short PR Interval Book 37. Ventricular Tachycardia Book and more... [Note] Some books need in app purchase to access the real patient cases The app is a well prepared training app for ACLS Rhythm Interpretation and Recognition. We spend ages on it, and believe it should help one way or another... And the development is not yet done, on weekly basis, we will publish more new cases for you to download and learn.
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.
- EKG interpretation practice
- Lead II simulation
- Study Mode with rhythm selection
- Game Mode for random rhythm identification
- Customizable rhythm sets
- Realistic rhythm variations
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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
Screenshots
Verdict
The clearest difference is review sentiment: ECG Books at 91% against arrhythmia's 44%. ECG Books also leads on monetization model (free with in-app purchases vs subscription) and rating (4.7 vs 4.1). On price, ratings volume, update cadence 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
Both are free to download. ECG Books sells 10 one-off in-app purchases and arrhythmia sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
ECG Books holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 159 and 113 respectively. Written reviews point the same way: 91% of ECG Books's written reviews are positive against 44% of arrhythmia's.
ECG Books ships an update monthly, arrhythmia every 3 weeks. Both last shipped on October 24, 2026.
| Parameter | ECG Books | arrhythmia |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (159 ratings) — better | 4.1 (113 ratings) |
| Positive reviews | 90.9% of reviews — better | 43.9% of reviews |
| Number of ratings | 159 — better | 113 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 10.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 44 MB | 159 MB |
| Age rating | 12+ | 17+ |
| Developer | WMS, Inc | Single Sail Software, LLC |
Customer experience
ECG Books
arrhythmia
User reviews
ECG Books
From 159 App Store ratingsWhat we love
- 👍 Detailed ECG explanations
- 🚀 Comprehensive ECG library
- 🤓 Helpful for learning and refreshing ECG knowledge
- 💡 Live ECG rhythm demonstrations
- 🎓 Great resource for medical/nursing students
Room to improve
- 🐛 Occasional crashes or compatibility issues
- 💰 Paid version required to unlock full content
- 🔍 Could use more in-depth explanations for beginners
- 🤔 Some typos or minor issues in descriptions
arrhythmia
From 113 App Store ratingsWhat we love
- 👍 Great study tool for EKGs
- 👍 Helpful for understanding EKGs
- 👍 Good for practicing rhythm recognition
- 👍 Interactive and colorful design
- 👍 Dynamic testing
Room to improve
- 👎 Immediately asks for paid version
- 👎 Missing common and important rhythms
- 👎 Rhythms are unrealistic
- 👎 Cannot try before signing up
- 👎 Clunky and slow horizontal scrolling
Bugs and requests
ECG Books
Reported bugs
2 issues- Login/sync issues between devices
- Compatibility problems with newer iOS versions
Requested features
4 requests- Add more ECG cases and examples
- Include a quiz or practice mode
- Improve font size and readability
- Introduce a free trial or more sample content
arrhythmia
Reported bugs
2 issues- App no longer works after iOS update
- App does not work on Apple Watch
Requested features
11 requests- 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
Show 6 moreShow fewer
- Add more examples for each rhythm
- Add a list view option for rhythms
- Add an explanation/rationale for correct/incorrect answers
- Add an animation showing what is happening in the heart when an answer is wrong
- Add tutorial or information on how to use the app
- Add 'Non-Conducted' PACs and similar rhythms
In-app purchases
ECG Books
- AF With RVR Book$0.99
- Atrial Flutter Book$1.99
- Long QT Prolongation Book$1.99
Show 7 moreShow fewer
- Pace Maker Book$1.99
- First-degree Atrioventricular Book$1.99
- II Degree AV Block Book$1.99
- ST Elevation Book$1.99
- Pulmonary Heart Disease Book$2.99
- VT Book$2.99
- ECG BOOKS PRO BUNDLE$9.99
arrhythmia
- Monthly7 Days trial$2.991 Month
- Yearly7 Days trial$19.991 Year
- Unlock All Rhythms (One-time Purchase)$4.99
Questions
Is ECG Books free?
Is arrhythmia free?
Which has better reviews, ECG Books or arrhythmia?
Do ECG Books or arrhythmia have ads?
Which is updated more often, ECG Books or arrhythmia?
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