# HudsonAlpha iCell vs TestNav

The clearest difference is review sentiment: HudsonAlpha iCell at 70% against TestNav's 24%. HudsonAlpha iCell also leads on rating (3.0 vs 1.6) and update cadence (every 4 weeks vs every 8 months). On price, ratings volume, 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.

HudsonAlpha iCell holds the better App Store score, 3.0 against 1.6. Both are backed by a comparable volume of ratings — 292 and 99 respectively. Written reviews point the same way: 70% of HudsonAlpha iCell's written reviews are positive against 24% of TestNav's.

HudsonAlpha iCell ships an update every 4 weeks, TestNav every 8 months. Both last shipped on October 16, 2026.

## The numbers

| Metric | HudsonAlpha iCell | TestNav |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (292 ratings)](https://appshunter.io/ios/app/hudsonalpha-icell/id364882015/reviews)** | [1.6 (99 ratings)](https://appshunter.io/ios/app/testnav/id818779127/reviews) |
| Number of ratings | **292** | 99 |
| Positive reviews | **69.8% of reviews** | 23.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 8 months |
| Monetization | Free | Free |
| Size | 83 MB | 2 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [HudsonAlpha Institute for Biotechnology](https://appshunter.io/developer/364882018) | [Pearson](https://appshunter.io/developer/1732560308) |

## What reviewers say

### HudsonAlpha iCell

[App page](https://appshunter.io/ios/app/hudsonalpha-icell/id364882015)

Explore the inner workings of animal, plant, and bacteria cells in a 3D interactive environment. Tap on cellular components to learn their names and functions. Rotate and zoom to get a comprehensive understanding of cellular biology.

**Highlights:** 3D interactive cell models, Animal, plant, and bacteria cell examples, Tap to select and learn organelle functions, Rotate and zoom functionality, Adjustable text size and description levels

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for learning about cells
- 🚀 Great 3D visuals and interactive features
- 💡 Different levels of complexity for various users
- 🎓 Useful for students and teachers

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 🔍 Limited content and organelles covered
- 🤔 Lacking in-depth information and functionality
- 🙄 Boring and oversimplified for some users

**Reported bugs**

- Frequent crashes and app instability
- Compatibility issues with newer iOS versions
- Missing or incorrectly labeled organelles

**Requested features**

- Add more cell types (e.g. fungi, virus)
- Provide quizzing and assessment features
- Improve level of detail and explanations
- Allow users to explore cell structures in more depth


### 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


## Frequently asked questions

### Is HudsonAlpha iCell free?

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

### Is TestNav free?

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

### Which has better reviews, HudsonAlpha iCell or TestNav?

HudsonAlpha iCell is rated higher. HudsonAlpha iCell averages 3.0 out of 5 from 292 ratings, while TestNav averages 1.6 from 99 ratings.

### Do HudsonAlpha iCell or TestNav have ads?

Neither HudsonAlpha iCell nor TestNav shows ads.

### Which is updated more often, HudsonAlpha iCell or TestNav?

HudsonAlpha iCell ships an update every 4 weeks, and TestNav every 8 months. Most recently, HudsonAlpha iCell was updated on October 16, 2026 and TestNav on October 16, 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.*