arrhythmia vs R2EMSprotocols
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
arrhythmia
Practice reading and identifying various cardiac rhythms in lead II. Features study and game modes with dynamic rhythm generation for realistic simulation. Access to the complete set of rhythms requires a subscription.
- Practice reading EKGs in lead II
- Study Mode for rhythm comparison
- Game Mode for rhythm identification challenges
- Dynamic rhythm generation
- Customizable rhythm selection
- Subscription for full content access
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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 pick up 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 choose which rhythms to include in the game. Access to the complete set of rhythms and topics 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
R2EMSprotocols
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R2EMSprotocols provides quick offline access to the NGPG Medical Transport (GA) protocols and supporting materials. Features include: •Quick indexed lookup of content in a matter of seconds •Search titles and text •Favorites tab for quick access of what's important to you •Updated regularly, ensuring content is up-to-date •Customizable notes for each individual entry •Always with you as long as you have your device and never fades or tears
Screenshots
Verdict
The clearest difference is in-app purchases: R2EMSprotocols at none against arrhythmia's 3. R2EMSprotocols also leads on iOS requirement (15.0 vs 26.6). arrhythmia's advantage is update cadence (every 4 weeks vs every 17 months). 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. R2EMSprotocols asks for nothing beyond the download.
arrhythmia ships an update every 4 weeks, R2EMSprotocols every 17 months. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.
| Parameter | arrhythmia | R2EMSprotocols |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (113 ratings) — better | — |
| Positive reviews | 43.9% of reviews | — |
| Number of ratings | 113 — better | — |
| Update frequency | Every 4 weeks — better | Every 17 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 26.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 27 MB |
| Age rating | 17+ | 17+ |
| Developer | Single Sail Software, LLC | Acid Remap LLC |
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
R2EMSprotocols
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
R2EMSprotocols
No in-app purchases
Questions
Is arrhythmia free?
Is R2EMSprotocols free?
Do arrhythmia or R2EMSprotocols have ads?
Which is updated more often, arrhythmia or R2EMSprotocols?
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