# Eye Chart HD vs Ophthalmic Instruments

The clearest difference is review sentiment: Ophthalmic Instruments at 100% against Eye Chart HD's 33%. Ophthalmic Instruments also leads on in-app purchases (none vs 2). Eye Chart HD's advantage is update cadence (every 6 months vs every 34 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Eye Chart HD sells 2 in-app purchases, starting at $2.99 per month. Ophthalmic Instruments asks for nothing beyond the download.

Eye Chart HD ships an update every 6 months, Ophthalmic Instruments every 34 months. The most recent releases landed on October 26, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Eye Chart HD | Ophthalmic Instruments |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/eye-chart-hd/id382019572/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 months** | Every 34 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 31 MB | 32 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Dok LLC](https://appshunter.io/developer/293163442) | [Roman Moiseev](https://appshunter.io/developer/1877504595) |

## What reviewers say

### Eye Chart HD

[App page](https://appshunter.io/ios/app/eye-chart-hd/id382019572)

This app provides a clinically evaluated visual acuity screening tool for various settings. It offers randomized Snellen, Tumbling E, and other charts to help assess vision, especially when traditional charts are unavailable or memorized. Additional features are available through a monthly subscription.

**Highlights:** Randomized Snellen charts, Tumbling E charts, Pocket vision screener, Line randomization, Chart selector, Near vision chart (subscription), Amsler Grid (subscription)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional Subscription | $2.99 | per month |
| Eye Chart HD Full Version | $0.99 | one-time |


### Ophthalmic Instruments

[App page](https://appshunter.io/ios/app/ophthalmic-instruments/id1666850241)

Access a comprehensive library of over 270 high-quality images of ophthalmic instruments, each with clear descriptions. Navigate effortlessly with an intuitive interface and test your knowledge with an interactive quiz mode.

**Highlights:** 270+ high-quality images, Clear, concise descriptions, Intuitive interface, Interactive knowledge check mode

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Eye Chart HD free?

Eye Chart HD is free to download, with in-app purchases available.

### Is Ophthalmic Instruments free?

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

### Do Eye Chart HD or Ophthalmic Instruments have ads?

Both Eye Chart HD and Ophthalmic Instruments show ads.

### Which is updated more often, Eye Chart HD or Ophthalmic Instruments?

Eye Chart HD ships an update every 6 months, and Ophthalmic Instruments every 34 months. Most recently, Eye Chart HD was updated on October 26, 2026 and Ophthalmic Instruments on October 17, 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.*