# King vs Vision Training & Eye Exercise

The clearest difference is rating: King at 5.0 against Vision Training & Eye Exercise's 4.5. King also leads on in-app purchases (none vs 3) and ads (none vs shown). Vision Training & Eye Exercise's advantage is update cadence (weekly vs every 2 months) and ratings volume (299 vs 2). On price there is nothing between them.

Both are free to download. Vision Training & Eye Exercise sells 3 in-app purchases, starting at $4.99 per 7 days. King asks for nothing beyond the download.

King holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Vision Training & Eye Exercise has 299 ratings behind it against 2, so its average is the more settled of the two.

King ships an update every 2 months, Vision Training & Eye Exercise weekly. The most recent releases landed on September 15, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | King | Vision Training & Eye Exercise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/king-devick-test/id1033607954/reviews)** | [4.5 (299 ratings)](https://appshunter.io/ios/app/vision-training-and-eye-exercise/id1471943589/reviews) |
| Number of ratings | 2 | **299** |
| Positive reviews | — | 64.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 243 MB | 378 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) | [Optics Trainer LLC](https://appshunter.io/developer/898519375) |

## What reviewers say

### King

[App page](https://appshunter.io/ios/app/king-devick-test/id1033607954)

This app provides a quick and objective sideline concussion screening test for athletes. It helps identify potential concussions by assessing eye movements, attention, and concentration through a simple number-reading exercise. Requires an existing King-Devick Online account.

**Highlights:** Objective sideline concussion screening, Assess eye movements and attention, Administer baseline and post-injury tests, Works offline, Suitable for ages 5+

**Features:** macOS Compatibility

**In-app purchases:** none


### Vision Training & Eye Exercise

[App page](https://appshunter.io/ios/app/vision-training-and-eye-exercise/id1471943589)

Enhance your visual skills with a variety of engaging games and personalized daily workouts. Improve convergence, divergence, stereo acuity, and binocular fusion. Test and strengthen visual memory, tracking, and peripheral vision for sharper focus.

**Highlights:** Vision therapy and training, 28+ engaging games, Personalized daily workouts, Improve convergence and divergence, Enhance stereo acuity and binocular fusion, Test visual memory and tracking

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $14.99 | per month |
| Annual Subscription | $149.99 | per year |


## Frequently asked questions

### Is King free?

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

### Is Vision Training & Eye Exercise free?

Vision Training & Eye Exercise is free to download, with in-app purchases available.

### Which has better reviews, King or Vision Training & Eye Exercise?

King is rated higher. King averages 5.0 out of 5 from 2 ratings, while Vision Training & Eye Exercise averages 4.5 from 299 ratings.

### Do King or Vision Training & Eye Exercise have ads?

Vision Training & Eye Exercise shows ads; King does not.

### Which is updated more often, King or Vision Training & Eye Exercise?

King ships an update every 2 months, and Vision Training & Eye Exercise weekly. Most recently, King was updated on September 15, 2026 and Vision Training & Eye Exercise on August 26, 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.*