# Human Factor vs Vocab Runner

The clearest difference is in-app purchases: Human Factor at none against Vocab Runner's 6. Vocab Runner's advantage is iOS requirement (18.0 vs 26.2). On price there is nothing between them.

Both are free to download. Vocab Runner sells 6 in-app purchases, starting at $2.99 per month. Human Factor asks for nothing beyond the download.

## The numbers

| Metric | Human Factor | Vocab Runner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | — | Every 5 days |
| Size | 1.9 GB | 242 MB |
| Requires iOS | 26.2 | **18.0** |
| Devices | — | **iPhone** |
| Age rating | 17+ | 4+ |
| Developer | [Masahiko Hattori](https://appshunter.io/developer/1870060089) | [aito hoshina](https://appshunter.io/developer/6792165110) |

## What reviewers say

### Human Factor

[App page](https://appshunter.io/ios/app/human-factor/id6759567429)

**In-app purchases:** none


### Vocab Runner

[App page](https://appshunter.io/ios/app/vocab-runner/id6798536403)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Super Pass Monthly | $2.99 | per month |
| Super Pass Yearly | $29.99 | per year |
| 60 diamantes | $1.99 | one-time |
| 300 diamantes | $7.99 | one-time |
| 900 diamantes | $19.99 | one-time |
| 3000 diamantes | $59.99 | one-time |


## Frequently asked questions

### Is Human Factor free?

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

### Is Vocab Runner free?

Vocab Runner is free to download, with in-app purchases available.

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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.*