Comparison

arrhythmia vs R2EMSprotocols

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

Head to head
About

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.

Highlights
  • 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
Features
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 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

About

R2EMSprotocols

Read full description

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

arrhythmia4 screens
R2EMSprotocols4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. R2EMSprotocols asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
arrhythmia versus R2EMSprotocols: the parameters behind the verdict, then further details
ParameterarrhythmiaR2EMSprotocols
PriceFreeFree
Rating4.1 (113 ratings) — better—
Positive reviews43.9% of reviews—
Number of ratings113 — better—
Update frequencyEvery 4 weeks — betterEvery 17 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS26.615.0 — better
Further details — not scored
Size22 MB27 MB
Age rating17+17+
DeveloperSingle Sail Software, LLCAcid 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
Show 6 more
  • 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

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
None

R2EMSprotocols

No in-app purchases

Questions

Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Is R2EMSprotocols free?
R2EMSprotocols is free to download, with no in-app purchases.
Do arrhythmia or R2EMSprotocols have ads?
Neither arrhythmia nor R2EMSprotocols shows ads.
Which is updated more often, arrhythmia or R2EMSprotocols?
arrhythmia ships an update every 4 weeks, and R2EMSprotocols every 17 months. Most recently, arrhythmia was updated on November 11, 2026 and R2EMSprotocols on November 7, 2026.

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