Comparison

arrhythmia vs ECG Notes

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
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

ECG Notes

This pocket guide offers a quick reference for ECG interpretation and management, covering basics, 12-lead ECGs, ACLS, CPR, and emergency medications. It includes over 100 ECG strips and practice questions, with content updated to the latest guidelines. No internet connection is needed after initial download.

Highlights
  • 125 ECG rhythm strips
  • Comprehensive coverage: basics, ECG, ACLS, PALS, meds, CPR
  • CPR algorithms in tabular format
  • Test Yourself ECG strips with real-life arrhythmias
  • Clinical Tips and PALS coverage
  • SmartSearch technology for quick look-up
  • Offline content access
Features
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"Try before you buy" - Download the FREE App, which includes sample content. In-App purchase required to unlock all content. A Davis’s Notes title! The pocket guide that covers it all—basics, 12-lead, ACLS, meds, and CPR for adults and children! A quick look-up reference for ECG interpretation and management! This indispensable pocket guide presents the basics (anatomy and physiology of the cardiovascular system, electrical conduction system of the heart, basic ECG concepts and components,) ACLS and CPR algorithms, emergency medications, and comprehensive information on monitoring leads and interpretation of over 100 ECG strips, including 12-lead and pacemaker rhythms. KEY FEATURES * Compact rhythm analysis guide with 125 ECG rhythm strips * Complete coverage—basics, ECG (including 3- and 12-lead) ACLS, PALS, meds, and CPR * CPR algorithms in tabular format * Test Yourself ECG strips feature over 30 real-life arrhythmias * Clinical Tips throughout * PALS tab (Pediatric Advanced Life Support) * Peds coverage throughout… * Meds—Doses where applicable * Skills—Defibrillation, automated defibrillation (AED), and cardioversion * Basics—Normal vital signs values * No internet connection is required to access the content after the initial download. Find information quickly using powerful SmartSearch technology. Search part of term for those hard to spell medical terms. NEW TO THIS EDITION * Updated & Expanded! Incorporating advances in science and clinical practice, including the American Heart Association’s 2020 CPR, ACLS, and PALS guidelines * Expanded! “Clinical Tips” and coverage of rhythm analysis * New! Summary table, “Identifying Features of Arrhythmias” * New sections! Six Easy Steps in Analyzing ECG Strips and ECG Monitoring * Expanded! The 12-Lead tab with more in-depth information about analyzing a 12-lead ECG See what practitioners and students are saying about the previous edition… * Worth every penny!! “Bought this to keep in my lab coat to help me interpret ECGs. It is absolutely perfect. Has several different rhythms and 50 practice questions. Wish I bought it sooner.”—Online Reviewer * If you are trying to learn EKG, this is a must have!! “Really convenient tool to learn from. Easy to navigate.”—Emily, L., Online Reviewer * Great for nursing students and RNs. “As a nurse educator (and earlier a staff RN) I made these required reading for my students, plus it's useful well beyond graduation.”—Barbara R., Online Reviewer * Perfect Pocket reference. “For those of us that don't always remember every detail of EKGs, and need some help on the fly, this is perfect. I can carry it with me for reference whenever I need. I have already recommended it to many of my colleagues.”—Online Reviewer Content licensed from printed ISBN 10: 1719641943 Content licensed from printed ISBN 13: 9781719641944 SUBSCRIPTION : Please purchase a yearly auto-renewing subscription to receive content access and available updates. Yearly auto-renewing payments- $34.99 Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Subscription may be managed by the user and auto-renewal can be disabled at any time by going to your device “Settings” and tapping “iTunes & App Store”. Any unused portion of a free trial period will be forfeited when you purchase a subscription, where applicable." If you have any questions or comments, email us any time: customersupport@skyscape.com or call 508-299-3000 Privacy Policy - https://www.skyscape.com/terms-of-service/privacypolicy.aspx Terms and Conditions - https://www.skyscape.com/terms-of-service/licenseagreement.aspx Author(s): Shirley A. Jones MSEd, MHA, MSN, EMT-P, RN Publisher: F.A. Davis Company

Screenshots

arrhythmia4 screens
ECG Notes4 screens

Verdict

The call

The clearest difference is monetization model: ECG Notes at free with in-app purchases against arrhythmia's subscription. ECG Notes also leads on rating (4.7 vs 4.2) and iOS requirement (13.0 vs 17.6). arrhythmia's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price, review sentiment, in-app purchases 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

Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month and ECG Notes sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

ECG Notes holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: arrhythmia has 111 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 45% of arrhythmia's written reviews are positive against 50% of ECG Notes's.

UpkeepUpdate frequency

arrhythmia ships an update every 3 weeks, ECG Notes every 3 months. The most recent releases landed on September 29, 2026 and August 12, 2026 respectively.

Scorecard7 real differences · 4 level
arrhythmia versus ECG Notes: the parameters behind the verdict, then further details
ParameterarrhythmiaECG Notes
PriceFreeFree
Rating4.2 (111 ratings)4.7 (12 ratings) — better
Positive reviews45.0% of reviews50.0% of reviews — better
Number of ratings111 — better12
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#159 — better—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.613.0 — better
Further details — not scored
Size159 MB46 MB
Age rating17+17+
DeveloperSingle Sail Software, LLCSkyscape Medpresso Inc

Customer experience

arrhythmia

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

ECG Notes

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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
1 purchases

ECG Notes

One-time1
  • ECG Notes-Ed.4$34.99

Questions

Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Is ECG Notes free?
ECG Notes is free to download, with in-app purchases available.
Which has better reviews, arrhythmia or ECG Notes?
ECG Notes is rated higher. arrhythmia averages 4.2 out of 5 from 111 ratings, while ECG Notes averages 4.7 from 12 ratings.
Do arrhythmia or ECG Notes have ads?
ECG Notes shows ads; arrhythmia does not.
Which is updated more often, arrhythmia or ECG Notes?
arrhythmia ships an update every 3 weeks, and ECG Notes every 3 months. Most recently, arrhythmia was updated on September 29, 2026 and ECG Notes on August 12, 2026.

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