Comparison

arrhythmia vs VeinScanner Pro

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

Head to head
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

About

VeinScanner Pro

Visualize veins with advanced imaging techniques. This app simulates infra-red scanning to enhance vein visibility, making it easier to locate them. It utilizes multispectral imaging to improve contrast and reduce unwanted light reflections.

Highlights
  • Vein visualization
  • Simulated infra-red scanning
  • Zoom functionality
  • Multispectral imaging principles
  • Enhanced vein contrast
  • Reduced light reflection
Features
Read full description

VeinScanner Pro is a vein finder app, with zoom functionality and simulated infra-red to replicate the look and feel of a dedicated vein scanning device. VeinScanner Pro uses multispectral imaging principles and the intrinsic optical properties of skin to produce enhanced images of veins; it boosts oxyhemoglobin/deoxyhemoglobin absorption contrast and reduces the contribution of superficially-scattered and specularly-reflected light to the overall image.

Screenshots

arrhythmia4 screens
VeinScanner Pro4 screens

Verdict

The call

The clearest difference is rating: arrhythmia at 4.1 against VeinScanner Pro's 1.9. arrhythmia also leads on update cadence (every 3 weeks vs every 14 months) and review sentiment (44% vs 23%). VeinScanner Pro's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (14.1 vs 17.6). On price, ads, in-app purchases 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 and VeinScanner Pro sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

arrhythmia holds the better App Store score, 4.1 against 1.9. Both are backed by a comparable volume of ratings — 113 and 28 respectively. Written reviews point the same way: 44% of arrhythmia's written reviews are positive against 23% of VeinScanner Pro's.

UpkeepUpdate frequency

arrhythmia ships an update every 3 weeks, VeinScanner Pro every 14 months. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
arrhythmia versus VeinScanner Pro: the parameters behind the verdict, then further details
ParameterarrhythmiaVeinScanner Pro
PriceFreeFree
Rating4.1 (113 ratings) — better1.9 (28 ratings)
Positive reviews43.9% of reviews — better22.9% of reviews
Number of ratings113 — better28
Update frequencyEvery 3 weeks — betterEvery 14 months
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS17.614.1 — better
Further details — not scored
Size159 MB7 MB
Age rating17+12+
DeveloperSingle Sail Software, LLCVeinSeek LLC

Customer experience

arrhythmia

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

VeinScanner Pro

All ratings27 ratings
Positive18.5%
Neutral3.7%
Negative77.8%
Written reviews48 reviews
Positive22.9%
Neutral2.1%
Negative75.0%

User reviews

arrhythmia

From 113 App Store ratings

What we love

  • 👍 Great study tool for EKGs
  • 👍 Helpful for understanding EKGs
  • 👍 Good for practicing rhythm recognition
  • 👍 Interactive and colorful design
  • 👍 Dynamic testing

Room to improve

  • 👎 Immediately asks for paid version
  • 👎 Missing common and important rhythms
  • 👎 Rhythms are unrealistic
  • 👎 Cannot try before signing up
  • 👎 Clunky and slow horizontal scrolling

VeinScanner Pro

From 28 App Store ratings

What we love

  • 👍 Helps find veins
  • 👍 Useful for difficult sticks
  • 👍 Visualizes microvasos
  • 👍 Works well for some users
  • 👍 Good for neonatal doctors

Room to improve

  • 🐛 Does not work for many users
  • 🐛 Shows nothing at all
  • 🐛 Black screen
  • 🐛 Veins more visible with eyes
  • 🐛 Garbage app

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

VeinScanner Pro

Reported bugs

8 issues
  • App does not work at all
  • Gives no help
  • Shows nothing at all
  • Black screen
  • Shows clutter that looks like veins
Show 3 more
  • Hairy arms mask veins
  • Hair stands out and masks veins
  • Makes veins less visible when adjusting slider

Requested features

5 requests
  • Better instructions or explanation on how to use
  • Explanation on how it's supposed to be used
  • Website with instructions or tips
  • Tips on how to use more efficiently
  • Explanation of functionality

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
3 purchases

VeinScanner Pro

Subscriptions3
  • Full Access3 Days trial$0.997 Days
  • Full Access$1.991 Month
  • Full Access$9.991 Year

Questions

Is arrhythmia free?
arrhythmia is free to download, with in-app purchases available.
Is VeinScanner Pro free?
VeinScanner Pro is free to download, with in-app purchases available.
Which has better reviews, arrhythmia or VeinScanner Pro?
arrhythmia is rated higher. arrhythmia averages 4.1 out of 5 from 113 ratings, while VeinScanner Pro averages 1.9 from 28 ratings.
Do arrhythmia or VeinScanner Pro have ads?
Neither arrhythmia nor VeinScanner Pro shows ads.
Which is updated more often, arrhythmia or VeinScanner Pro?
arrhythmia ships an update every 3 weeks, and VeinScanner Pro every 14 months. Most recently, arrhythmia was updated on October 21, 2026 and VeinScanner Pro on October 25, 2026.

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