# Eye Handbook vs Opto

The clearest difference is rating: Eye Handbook at 4.8 against Opto's 3.0. Eye Handbook also leads on in-app purchases (none vs 2) and review sentiment (82% vs 50%). Opto's advantage is ads (none vs shown) and iOS requirement (12.1 vs 16.0). On price and device support there is nothing between them.

Both are free to download. Opto sells 2 in-app purchases, starting at $34.99 per month. Eye Handbook asks for nothing beyond the download.

Eye Handbook holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Eye Handbook has 1.2K ratings behind it against 2, 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 50% of Opto's.

## The numbers

| Metric | Eye Handbook | Opto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/eye-handbook/id335546959/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/opto-screen/id1495864206/reviews) |
| Number of ratings | **1.2K** | 2 |
| Positive reviews | **82.2% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 480 MB | 15 MB |
| Requires iOS | 16.0 | **12.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cloud Nine Development LLC](https://appshunter.io/developer/335546962) | [Visual Intelligence, LLC](https://appshunter.io/developer/1495863815) |

## 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)


### Opto

[App page](https://appshunter.io/ios/app/opto-screen/id1495864206)

This application allows users to visually study the pupil and iris with enhanced clarity. It offers a patented method for determining pupil roundness through direct examination and two levels of quantification. Ideal for anyone interested in external eye study.

**Highlights:** Visualize pupil and iris, Clearer eye view than naked eye, Determine pupil roundness, Patented quantification method, External eye study tool

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Opto-Screen Monthly Access | $34.99 | per month |
| Opto-Screen Annual Plan | $349.99 | per year |


## Frequently asked questions

### Is Eye Handbook free?

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

### Is Opto free?

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

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

Eye Handbook is rated higher. Eye Handbook averages 4.8 out of 5 from 1.2K ratings, while Opto averages 3.0 from 2 ratings.

### Do Eye Handbook or Opto have ads?

Eye Handbook shows ads; Opto does not.

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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.*