# Eye Chart HD vs 9 Gaze

Eye Chart HD and 9 Gaze both sit at 4.4 stars, but that hides the real split: 86% of 9 Gaze's written reviews are positive against 33% of Eye Chart HD's. 9 Gaze also leads on in-app purchases (none vs 2) and ads (none vs shown). On price, rating, 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. 9 Gaze asks for nothing beyond the download.

9 Gaze holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 7 and 22 respectively. Written reviews point the same way: 33% of Eye Chart HD's written reviews are positive against 86% of 9 Gaze's.

Eye Chart HD ships an update every 6 months, 9 Gaze every 2 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Eye Chart HD | 9 Gaze |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/eye-chart-hd/id382019572/reviews) | **[4.6 (22 ratings)](https://appshunter.io/ios/app/9-gaze/id1173442389/reviews)** |
| Number of ratings | 7 | **22** |
| Positive reviews | 33.3% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 31 MB | 36 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Dok LLC](https://appshunter.io/developer/293163442) | [See Vision, LLC](https://appshunter.io/developer/1173442388) |

## 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 |


### 9 Gaze

[App page](https://appshunter.io/ios/app/9-gaze/id1173442389)

This app helps document eye motility and strabismus in nine cardinal positions. It offers an on-screen guide for consistent eye positioning and automatically creates composite images for easy exporting. Users can add strabismus measurements and email or save images for medical records.

**Highlights:** Document eye motility and strabismus, On-screen guide for eye positioning, Automatic composite image creation, Add strabismus measurements, Selfie or standard mode, Email or save images

**Features:** macOS Compatibility, 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 9 Gaze free?

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

### Which has better reviews, Eye Chart HD or 9 Gaze?

9 Gaze is rated higher. Eye Chart HD averages 4.4 out of 5 from 7 ratings, while 9 Gaze averages 4.6 from 22 ratings.

### Do Eye Chart HD or 9 Gaze have ads?

Eye Chart HD shows ads; 9 Gaze does not.

### Which is updated more often, Eye Chart HD or 9 Gaze?

Eye Chart HD ships an update every 6 months, and 9 Gaze every 2 months. Most recently, Eye Chart HD was updated on November 6, 2026 and 9 Gaze on November 6, 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.*