# Eye Handbook vs Exon Map Explorer

The clearest difference is ads: Exon Map Explorer at none against Eye Handbook's shown. Exon Map Explorer also leads on iOS requirement (12.0 vs 16.0). On price, update cadence, 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.

Eye Handbook ships an update every 3 weeks, Exon Map Explorer every 5 weeks. The most recent releases landed on October 15, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Eye Handbook | Exon Map Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/eye-handbook/id335546959/reviews)** | — |
| Number of ratings | **1.2K** | — |
| Positive reviews | 81.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Ad-supported | — |
| Size | 480 MB | 8 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cloud Nine Development LLC](https://appshunter.io/developer/335546962) | [SAREPTA THERAPEUTICS, INC.](https://appshunter.io/developer/1604723220) |

## 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)


### Exon Map Explorer

[App page](https://appshunter.io/ios/app/exon-map-explorer/id1604723218)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Eye Handbook free?

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

### Is Exon Map Explorer free?

Exon Map Explorer is free to download, with no in-app purchases.

### Do Eye Handbook or Exon Map Explorer have ads?

Eye Handbook shows ads; Exon Map Explorer does not.

### Which is updated more often, Eye Handbook or Exon Map Explorer?

Eye Handbook ships an update every 3 weeks, and Exon Map Explorer every 5 weeks. Most recently, Eye Handbook was updated on October 15, 2026 and Exon Map Explorer on September 23, 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.*