# arrhythmia vs VeinScanner Pro

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.

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.

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.

arrhythmia ships an update every 3 weeks, VeinScanner Pro every 14 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | arrhythmia | VeinScanner Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews)** | [1.9 (28 ratings)](https://appshunter.io/ios/app/veinscanner-pro/id1573763274/reviews) |
| Number of ratings | **113** | 28 |
| Positive reviews | **43.9% of reviews** | 22.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 159 MB | 7 MB |
| Requires iOS | 17.6 | **14.1** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [VeinSeek LLC](https://appshunter.io/developer/1114534654) |

## What reviewers say

### arrhythmia

[App page](https://appshunter.io/ios/app/arrhythmia/id996560473)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $19.99 | per year |
| Unlock All Rhythms (One-time Purchase) | $4.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- App no longer works after iOS update
- App does not work on Apple Watch

**Requested features**

- 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


### VeinScanner Pro

[App page](https://appshunter.io/ios/app/veinscanner-pro/id1573763274)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $0.99 | per 7 days |
| Full Access | $1.99 | per month |
| Full Access | $9.99 | per year |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- App does not work at all
- Gives no help
- Shows nothing at all
- Black screen
- Shows clutter that looks like veins

**Requested features**

- 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


## Frequently asked 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 24, 2026 and VeinScanner Pro on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*