# TestNav vs Metabolism Sim

The clearest difference is rating: Metabolism Sim at 3.2 against TestNav's 1.6. Metabolism Sim also leads on review sentiment (57% vs 24%) and update cadence (every 3 months 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.

Metabolism Sim holds the better App Store score, 3.2 against 1.6. Both are backed by a comparable volume of ratings — 104 and 71 respectively. Written reviews point the same way: 24% of TestNav's written reviews are positive against 57% of Metabolism Sim's.

TestNav ships an update every 8 months, Metabolism Sim every 3 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | TestNav | Metabolism Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (104 ratings)](https://appshunter.io/ios/app/testnav/id818779127/reviews) | **[3.2 (71 ratings)](https://appshunter.io/ios/app/metabolism-sim/id992862964/reviews)** |
| Number of ratings | **104** | 71 |
| Positive reviews | 23.6% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 2 MB | 132 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pearson](https://appshunter.io/developer/1732560308) | [Amplify Education, Inc.](https://appshunter.io/developer/433704168) |

## 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


### Metabolism Sim

[App page](https://appshunter.io/ios/app/metabolism-sim/id992862964)

This application simulates human metabolism, designed to complement a science curriculum. It requires a valid Amplify login and license provided by a school to function.

**Highlights:** Metabolism simulation, Science curriculum integration, Requires Amplify login, School-provided license needed

**In-app purchases:** none


## Frequently asked questions

### Is TestNav free?

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

### Is Metabolism Sim free?

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

### Which has better reviews, TestNav or Metabolism Sim?

Metabolism Sim is rated higher. TestNav averages 1.6 out of 5 from 104 ratings, while Metabolism Sim averages 3.2 from 71 ratings.

### Do TestNav or Metabolism Sim have ads?

Neither TestNav nor Metabolism Sim shows ads.

### Which is updated more often, TestNav or Metabolism Sim?

TestNav ships an update every 8 months, and Metabolism Sim every 3 months. Most recently, TestNav was updated on November 1, 2026 and Metabolism Sim on November 6, 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.*