# NIH Toolbox vs eVAS

The clearest difference is in-app purchases: eVAS at none against NIH Toolbox's 5. eVAS also leads on update cadence (every 3 days vs every 4 months) and iOS requirement (15.1 vs 18.0). On price, 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. eVAS asks for nothing beyond the download.

NIH Toolbox ships an update every 4 months, eVAS every 3 days. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NIH Toolbox | eVAS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/nih-toolbox/id1002228307/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 715 MB | 25 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Glinberg & Associates, Inc](https://appshunter.io/developer/981361720) | [Ryan Tennant](https://appshunter.io/developer/1574063423) |

## What reviewers say

### 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 |


### eVAS

[App page](https://appshunter.io/ios/app/evas/id6447213570)

**In-app purchases:** none


## Frequently asked questions

### Is NIH Toolbox free?

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

### Is eVAS free?

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

### Do NIH Toolbox or eVAS have ads?

Neither NIH Toolbox nor eVAS shows ads.

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

NIH Toolbox ships an update every 4 months, and eVAS every 3 days. Most recently, NIH Toolbox was updated on October 7, 2026 and eVAS on September 27, 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.*