# TestNav vs DERS

The clearest difference is rating: DERS at 5.0 against TestNav's 1.6. TestNav's advantage is ratings volume (104 vs 4) and iOS requirement (13.0 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

DERS holds the better App Store score, 5.0 against 1.6. That said, the two scores are not equally well evidenced: TestNav has 104 ratings behind it against 4, so its average is the more settled of the two.

TestNav ships an update every 8 months, DERS every 5 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | TestNav | DERS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (104 ratings)](https://appshunter.io/ios/app/testnav/id818779127/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/ders/id1197202080/reviews)** |
| Number of ratings | **104** | 4 |
| Positive reviews | 23.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 2 MB | 0 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pearson](https://appshunter.io/developer/1732560308) | [National Centre for Montessori in the Public Sector, Inc.](https://appshunter.io/developer/1197202079) |

## What reviewers say

### TestNav

[App page](https://appshunter.io/ios/app/testnav/id818779127)

This application provides a secure and reliable platform for delivering educational tests online. It ensures test items are presented consistently across devices.

**Highlights:** Secure test delivery, Reliable online platform, Consistent test item presentation, iOS device compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 App is available for iPad
- 👍 Some users find it easy to use
- 👍 Some users find it helpful for school
- 👍 Some users find it 'super good' or 'amazing'

**What reviewers complain about**

- 😞 App is described as 'trash' or 'garbage'
- 😞 Frequent crashes and bugs reported
- 😞 Users experience extreme boredom and frustration
- 😞 App is perceived as a waste of time
- 😞 Some users report it 'never works'

**Reported bugs**

- Open response boxes never work properly
- Drag and drop not working
- Permission errors for speech, mic, etc.
- App crashes all the time
- App doesn't work

**Requested features**

- Way to lower brightness
- Actual Dark Mode
- Allow access to Accessibility Shortcuts menu during testing
- Enable/disable inverted colors during testing
- Enable zoom during testing


### DERS

[App page](https://appshunter.io/ios/app/ders/id1197202080)

This tool assesses the quality of learning environments for children aged 2.5 to 12. It measures environmental design and implementation against desired developmental outcomes, focusing on executive functions, literacy, and social-emotional growth.

**Highlights:** Measures learning environment quality, Focuses on executive functions, Assesses literacy development, Evaluates social-emotional growth, Research-based environmental attributes, Classroom observation tool

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TestNav free?

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

### Is DERS free?

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

### Which has better reviews, TestNav or DERS?

DERS is rated higher. TestNav averages 1.6 out of 5 from 104 ratings, while DERS averages 5.0 from 4 ratings.

### Do TestNav or DERS have ads?

Neither TestNav nor DERS shows ads.

### Which is updated more often, TestNav or DERS?

TestNav ships an update every 8 months, and DERS every 5 months. Most recently, TestNav was updated on November 1, 2026 and DERS on October 29, 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.*