Comparison

Napa County EMS vs arrhythmia

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

Head to head
About

Napa County EMS

Access emergency medical protocols offline with quick search and customizable features. Stay updated with the latest guidelines and easily access important contacts and notes.

Highlights
  • Offline protocol access
  • Indexed lookup
  • Search titles and text
  • Favorites tab
  • Customizable contacts and mapping
  • Customizable notes
Read full description

Napa County EMS is an app that provides quick offline access to the Napa County, CA protocols. Features include: •Quick indexed lookup of protocols in a matter of seconds •Search titles and text •Favorites tab for quick access of what's important to you •Updated shortly after new protocols are posted online making it more up-to-date than most printed protocol manuals •Customizable hospital contact information and mapping •Customizable notes for each individual protocol entry •Always with you as long as you have your device and never fades or tears

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
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

Screenshots

Napa County EMS4 screens
arrhythmia4 screens

Verdict

The call

The clearest difference is in-app purchases: Napa County EMS at none against arrhythmia's 3. Napa County EMS also leads on rating (4.5 vs 4.1) and iOS requirement (15.0 vs 17.6). arrhythmia's advantage is update cadence (every 3 weeks vs every 4 months) and ratings volume (113 vs 2). 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. Napa County EMS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Napa County EMS holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: arrhythmia has 113 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Napa County EMS ships an update every 4 months, arrhythmia every 3 weeks. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

Scorecard6 real differences · 4 level
Napa County EMS versus arrhythmia: the parameters behind the verdict, then further details
ParameterNapa County EMSarrhythmia
PriceFreeFree
Rating4.5 (2 ratings) — better4.1 (113 ratings)
Positive reviews—43.9% of reviews
Number of ratings2113 — better
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better17.6
Further details — not scored
Size28 MB159 MB
Age rating17+17+
DeveloperAcid Remap LLCSingle Sail Software, LLC

Customer experience

Napa County EMS

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

arrhythmia

All ratings111 ratings
Positive80.2%
Neutral4.5%
Negative15.3%
Written reviews41 reviews
Positive43.9%
Neutral7.3%
Negative48.8%

Bugs and requests

Napa County EMS

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Napa County EMS

No 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

Questions

Is Napa County EMS free?
Napa County EMS is free to download, with no in-app purchases.
Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Which has better reviews, Napa County EMS or arrhythmia?
Napa County EMS is rated higher. Napa County EMS averages 4.5 out of 5 from 2 ratings, while arrhythmia averages 4.1 from 113 ratings.
Do Napa County EMS or arrhythmia have ads?
Neither Napa County EMS nor arrhythmia shows ads.
Which is updated more often, Napa County EMS or arrhythmia?
Napa County EMS ships an update every 4 months, and arrhythmia every 3 weeks. Most recently, Napa County EMS was updated on November 3, 2026 and arrhythmia on November 1, 2026.

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