arrhythmia vs NK Dimensions AR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
NK Dimensions AR
Learn proper electrode placement for 3 and 6 lead sets. This app also educates clinicians on identifying and understanding common cardiac arrhythmias. Requires physical posters to use.
- Electrode placement learning
- 3 and 6 lead set guidance
- Cardiac arrhythmia identification
- Clinical education tool
- Augmented reality visualization
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At Nihon Kohden, we believe life-saving information is too important not to share. This app is designed to assist you in learning electrode placement using our 3 and 6 lead sets. The app is also used to educate the clinician on identifying and understanding some of the most common cardiac arrhythmias. To use this app, you must first have the Nihon Kohden Lead Placement and Arrhythmia Identification posters. If you would like to order posters or find out more information, please visit us at www.nkuniversity.org
Screenshots
Verdict
The clearest difference is rating: NK Dimensions AR at 5.0 against arrhythmia's 4.1. NK Dimensions AR also leads on in-app purchases (none vs 3) and update cadence (weekly vs every 3 weeks). arrhythmia's advantage is ratings volume (113 vs 3) and chart position (#198 vs unranked). On price, 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
Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. NK Dimensions AR asks for nothing beyond the download.
NK Dimensions AR holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: arrhythmia has 113 ratings behind it against 3, so its average is the more settled of the two.
arrhythmia ships an update every 3 weeks, NK Dimensions AR weekly. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.
| Parameter | arrhythmia | NK Dimensions AR |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (113 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 43.9% of reviews | — |
| Number of ratings | 113 — better | 3 |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Best chart rank | #198 — better | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 159 MB | 212 MB |
| Age rating | 17+ | 12+ |
| Developer | Single Sail Software, LLC | Nihon Kohden America, Inc. |
Customer experience
arrhythmia
NK Dimensions AR
Bugs and requests
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
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- 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
NK Dimensions AR
Not enough reviews yet to summarise bugs or requests.
In-app purchases
arrhythmia
- Monthly7 Days trial$2.991 Month
- Yearly7 Days trial$19.991 Year
- Unlock All Rhythms (One-time Purchase)$4.99
NK Dimensions AR
No in-app purchases
Questions
Is arrhythmia free?
Is NK Dimensions AR free?
Which has better reviews, arrhythmia or NK Dimensions AR?
Do arrhythmia or NK Dimensions AR have ads?
Which is updated more often, arrhythmia or NK Dimensions AR?
Other comparisons
