# arrhythmia vs UTSW BioTel Guidelines

The clearest difference is rating: UTSW BioTel Guidelines at 5.0 against arrhythmia's 4.1. UTSW BioTel Guidelines also leads on in-app purchases (none vs 3) and iOS requirement (15.0 vs 17.6). arrhythmia's advantage is update cadence (every 3 weeks vs every 11 months) and ratings volume (113 vs 1). On price, ads 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. UTSW BioTel Guidelines asks for nothing beyond the download.

UTSW BioTel Guidelines holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: arrhythmia has 113 ratings behind it against 1, so its average is the more settled of the two.

arrhythmia ships an update every 3 weeks, UTSW BioTel Guidelines every 11 months. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | arrhythmia | UTSW BioTel Guidelines |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (113 ratings)](https://appshunter.io/ios/app/arrhythmia/id996560473/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/utsw-biotel-guidelines/id6502013312/reviews)** |
| Number of ratings | **113** | 1 |
| Positive reviews | 43.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 11 months |
| Monetization | Subscription | **Free** |
| Size | 159 MB | 28 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Single Sail Software, LLC](https://appshunter.io/developer/359715495) | [Acid Remap LLC](https://appshunter.io/developer/323130617) |

## 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


### UTSW BioTel Guidelines

[App page](https://appshunter.io/ios/app/utsw-biotel-guidelines/id6502013312)

Access medical protocols and supporting materials offline with quick search and customizable notes. This app is regularly updated to ensure content is current and always available on your device.

**Highlights:** Offline access to protocols, Quick indexed lookup, Search titles and text, Favorites tab, Customizable notes, Regular updates

**In-app purchases:** none


## Frequently asked questions

### Is arrhythmia free?

arrhythmia is free to download, with in-app purchases available.

### Is UTSW BioTel Guidelines free?

UTSW BioTel Guidelines is free to download, with no in-app purchases.

### Which has better reviews, arrhythmia or UTSW BioTel Guidelines?

UTSW BioTel Guidelines is rated higher. arrhythmia averages 4.1 out of 5 from 113 ratings, while UTSW BioTel Guidelines averages 5.0 from 1 ratings.

### Do arrhythmia or UTSW BioTel Guidelines have ads?

Neither arrhythmia nor UTSW BioTel Guidelines shows ads.

### Which is updated more often, arrhythmia or UTSW BioTel Guidelines?

arrhythmia ships an update every 3 weeks, and UTSW BioTel Guidelines every 11 months. Most recently, arrhythmia was updated on October 24, 2026 and UTSW BioTel Guidelines on October 20, 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.*