# Eye Handbook vs iTorsion

The clearest difference is ads: iTorsion at none against Eye Handbook's shown. iTorsion also leads on review sentiment (100% vs 82%) and monetization model (free vs ad-supported). Eye Handbook's advantage is ratings volume (1.2K vs 6) and update cadence (every 3 weeks vs every 3 months). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iTorsion holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Eye Handbook has 1.2K ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 82% of Eye Handbook's written reviews are positive against 100% of iTorsion's.

Eye Handbook ships an update every 3 weeks, iTorsion every 3 months. The most recent releases landed on November 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Eye Handbook | iTorsion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.2K ratings)](https://appshunter.io/ios/app/eye-handbook/id335546959/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/itorsion/id1358552637/reviews)** |
| Number of ratings | **1.2K** | 6 |
| Positive reviews | 82.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | **Free** |
| Size | 480 MB | 17 MB |
| Requires iOS | 16.0 | **10.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Cloud Nine Development LLC](https://appshunter.io/developer/335546962) | [Regents of the University of Minnesota](https://appshunter.io/developer/455216626) |

## What reviewers say

### Eye Handbook

[App page](https://appshunter.io/ios/app/eye-handbook/id335546959)

A comprehensive eye care reference app for ophthalmologists, optometrists, and students. It offers diagnostic tools, treatment references, calculators, educational resources, and community forums to support eye care professionals.

**Highlights:** Diagnostic and treatment reference, Eye calculators (visual acuity, diabetic retinopathy, etc.), Medication and pharmacopeia, Ophthalmology and optometry journals, Patient education tools, Peer-to-peer forums, Eye atlas and diagrams

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Useful information and tools
- 🚀 Comprehensive and efficient
- 💡 Great resource for eye care professionals
- 😊 Excellent app overall

**What reviewers complain about**

- 🐛 Crashes and bugs
- 📢 Intrusive ads and pop-ups
- 🔍 Poorly organized interface
- 🔋 High battery consumption

**Reported bugs**

- Registration process issues
- Compatibility problems with newer iOS versions
- Incorrect medication information

**Requested features**

- Add Tumbling E and Landolt C charts
- Improve search functionality
- Provide a paid ad-free version
- Optimize for larger screens (iPad)


### iTorsion

[App page](https://appshunter.io/ios/app/itorsion/id1358552637)

This medical app simplifies diagnosing ocular torsion using just a smartphone and red/green glasses. It offers greater precision than traditional methods, providing extorsion and intorsion measurements for each eye after a patient test.

**Highlights:** Ocular torsion diagnosis, Smartphone-based testing, Red/green glasses compatibility, Precise measurement, Extorsion and intorsion calculation, Customizable color values

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Eye Handbook free?

Eye Handbook is free to download, with no in-app purchases.

### Is iTorsion free?

iTorsion is free to download, with no in-app purchases.

### Which has better reviews, Eye Handbook or iTorsion?

iTorsion is rated higher. Eye Handbook averages 4.8 out of 5 from 1.2K ratings, while iTorsion averages 5.0 from 6 ratings.

### Do Eye Handbook or iTorsion have ads?

Eye Handbook shows ads; iTorsion does not.

### Which is updated more often, Eye Handbook or iTorsion?

Eye Handbook ships an update every 3 weeks, and iTorsion every 3 months. Most recently, Eye Handbook was updated on November 1, 2026 and iTorsion on October 12, 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.*