# King vs NIH Toolbox

The clearest difference is rating: King at 5.0 against NIH Toolbox's 1.0. King also leads on in-app purchases (none vs 5) and iOS requirement (11.0 vs 18.0). NIH Toolbox's advantage is update cadence (every 4 months vs every 19 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. NIH Toolbox sells 5 in-app purchases, starting at $0.99 per 7 days. King asks for nothing beyond the download.

King holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

King ships an update every 19 months, NIH Toolbox every 4 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | King | NIH Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/king-devick-recovery-practice/id770639096/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/nih-toolbox/id1002228307/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 178 MB | 715 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [King-Devick Test, LLC](https://appshunter.io/developer/424793545) | [Glinberg & Associates, Inc](https://appshunter.io/developer/981361720) |

## What reviewers say

### King

[App page](https://appshunter.io/ios/app/king-devick-recovery-practice/id770639096)

This application assists individuals with eye movement deficits stemming from neurological impairment. It facilitates practice with an oculomotor program, presenting number targets for reading aloud to improve vision-related symptoms after brain injury. The program offers adjustable speed settings and tracks progress.

**Highlights:** Oculomotor program practice, Dynamic number target presentation, Adjustable speed settings, Instant outcome measures, Compliance monitoring, Requires existing account

**Features:** macOS Compatibility

**In-app purchases:** none


### NIH Toolbox

[App page](https://appshunter.io/ios/app/nih-toolbox/id1002228307)

This legacy app provides a comprehensive set of measures for cognitive, emotional, motor, and sensory function in individuals aged 3-85. Designed for research and clinical use, it offers streamlined workflows for over 50 tests. Note: this version will be retired in June 2028.

**Highlights:** Cognitive, emotional, motor, sensory function assessment, Ages 3-85, Research and clinical use, Streamlined workflows, Over 50 tests, Crosswalk among measures

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NIH Toolbox Assessments | $0.99 | per 7 days |
| NIH Toolbox Assessments | $499.99 | per year |
| NIH Toolbox Assessments | $499.99 | per year |
| NIH Toolbox Assessments | $499.99 | per year |
| NIH Toolbox Assessments | $1299.99 | per year |


## Frequently asked questions

### Is King free?

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

### Is NIH Toolbox free?

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

### Which has better reviews, King or NIH Toolbox?

King is rated higher. King averages 5.0 out of 5 from 2 ratings, while NIH Toolbox averages 1.0 from 1 ratings.

### Do King or NIH Toolbox have ads?

Neither King nor NIH Toolbox shows ads.

### Which is updated more often, King or NIH Toolbox?

King ships an update every 19 months, and NIH Toolbox every 4 months. Most recently, King was updated on October 7, 2026 and NIH Toolbox on October 7, 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.*