Comparison

ACLS Fast vs arrhythmia

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

Head to head
About

ACLS Fast

This app provides rapid guidance for ACLS 2020 guidelines, helping users quickly determine appropriate therapies through a question-based system. It includes information on rhythms, arrhythmias, acute coronary and stroke syndromes, and features a two-minute timer for code management.

Highlights
  • Question-based therapy guidance
  • Rhythms and arrhythmias management
  • Acute coronary and stroke syndrome protocols
  • Two-minute code timer with alarm
  • Interactive multiple-choice exams
  • Rapid diagnosis and treatment support
Features
Read full description

This is the fastest utility for managing and preparing for the ACLS 2020 guidelines. Unlike other apps that present algorithm sheets, this smart utility guides you to the pertinent therapy by asking one to two questions. ACLS Fast gives you all the rhythms and arrhythmias along with the specific treatments. You also have acute coronary and stroke syndrome management. In addition, there is a two minute timer to assist you with time management during a code. Now you don't have to second guess when two minutes pass and it is time to recheck vitals and shock. Every two minutes a loud alarm activates. The timer is resettable. Need to start inotropes, but you can't remember the right ones? This app has it and it is fast! Finally, you can take an interactive exam. There are many multiple-choice questions from which you can choose. Use this to test your knowledge or sharpen your ability to take care of patients. You can use the app in the field and hospital for rapid diagnosis and treatment. You can also use it as a quick, comprehensive study tool. Either way, nothing is this fast or simple. Also, check out PALS Fast for pediatrics.

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

Screenshots

ACLS Fast4 screens
arrhythmia4 screens

Verdict

The call

The clearest difference is price: arrhythmia at Free against ACLS Fast's $3.99. arrhythmia also leads on rating (4.2 vs 2.8) and update cadence (every 3 weeks vs every 3 months). ACLS Fast's advantage is in-app purchases (none vs 3) and review sentiment (76% vs 45%). On 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

arrhythmia is free to download; ACLS Fast costs $3.99 up front. arrhythmia sells 3 in-app purchases, starting at $2.99 per month. ACLS Fast asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

arrhythmia holds the better App Store score, 4.2 against 2.8. That said, the two scores are not equally well evidenced: arrhythmia has 111 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 76% of ACLS Fast's written reviews are positive against 45% of arrhythmia's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ACLS Fast ships an update every 3 months, arrhythmia every 3 weeks. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard9 real differences · 2 level
ACLS Fast versus arrhythmia: the parameters behind the verdict, then further details
ParameterACLS Fastarrhythmia
Price$3.99Free — better
Rating2.8 (4 ratings)4.2 (111 ratings) — better
Positive reviews75.8% of reviews — better45.0% of reviews
Number of ratings4111 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
Best chart rank—#188 — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS12.0 — better17.6
Further details — not scored
Size20 MB159 MB
Age rating+1717+
DeveloperCrystal Clear SolutionsSingle Sail Software, LLC

Customer experience

ACLS Fast

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews33 reviews
Positive75.8%
Neutral3.0%
Negative21.2%

arrhythmia

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

In-app purchases

None

ACLS Fast

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 ACLS Fast free?
ACLS Fast costs $3.99, with no in-app purchases.
Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Which has better reviews, ACLS Fast or arrhythmia?
arrhythmia is rated higher. ACLS Fast averages 2.8 out of 5 from 4 ratings, while arrhythmia averages 4.2 from 111 ratings.
Do ACLS Fast or arrhythmia have ads?
Neither ACLS Fast nor arrhythmia shows ads.
Which is updated more often, ACLS Fast or arrhythmia?
ACLS Fast ships an update every 3 months, and arrhythmia every 3 weeks. Most recently, ACLS Fast was updated on September 24, 2026 and arrhythmia on September 21, 2026.

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