# Otnac vs NIH Toolbox V3

The clearest difference is rating: NIH Toolbox V3 at 4.7 against Otnac's 3.0. Otnac's advantage is in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 2 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. NIH Toolbox V3 sells 3 in-app purchases, starting at $599.99 per year. Otnac asks for nothing beyond the download.

NIH Toolbox V3 holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Otnac ships an update every 3 weeks, NIH Toolbox V3 every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Otnac | NIH Toolbox V3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/otnac/id417750647/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/nih-toolbox-v3/id1627119550/reviews)** |
| Number of ratings | 2 | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Subscription |
| Size | 567 MB | 938 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPad | iPad |
| Age rating | 17+ | 4+ |
| Developer | [Epic](https://appshunter.io/developer/348308666) | [Toolbox Assessments, Inc.](https://appshunter.io/developer/1724444781) |

## What reviewers say

### Otnac

[App page](https://appshunter.io/ios/app/otnac/id417750647)

This application allows project team members and system administrators of organizations using Epic Canto to preview upcoming development before it is released to clinicians. Access requires administrator security within an organization that is live on or installing Canto. Clinical users should download the standard Epic Canto app instead.

**Highlights:** Preview upcoming Epic Canto development, For project team members, For system administrators, Requires Epic Canto installation, Administrator security access

**In-app purchases:** none


### NIH Toolbox V3

[App page](https://appshunter.io/ios/app/nih-toolbox-v3/id1627119550)

This app provides a comprehensive set of measures to assess cognitive, emotional, motor, and sensory functions in individuals aged 3-85. Designed for research and clinical use, it offers streamlined workflows and a user interface for over 50 measures, enabling data pooling and crosswalk analysis.

**Highlights:** Cognitive, emotional, motor, sensory function assessment, Ages 3-85, Streamlined workflows and UI, Over 50 measures, Crosswalk among measures, Includes PROMIS tests

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access on 2 iPads | $599.99 | per year |
| Access on 6 iPads | $1499.99 | per year |
| Access on 10 iPads | $2499.99 | per year |


## Frequently asked questions

### Is Otnac free?

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

### Is NIH Toolbox V3 free?

NIH Toolbox V3 is free to download, with in-app purchases available.

### Which has better reviews, Otnac or NIH Toolbox V3?

NIH Toolbox V3 is rated higher. Otnac averages 3.0 out of 5 from 2 ratings, while NIH Toolbox V3 averages 4.7 from 3 ratings.

### Do Otnac or NIH Toolbox V3 have ads?

Neither Otnac nor NIH Toolbox V3 shows ads.

### Which is updated more often, Otnac or NIH Toolbox V3?

Otnac ships an update every 3 weeks, and NIH Toolbox V3 every 2 months. Most recently, Otnac was updated on November 6, 2026 and NIH Toolbox V3 on November 3, 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.*