# Paper Trained vs Quick Theory

The clearest difference is in-app purchases: Paper Trained at none against Quick Theory's 3. Paper Trained also leads on iOS requirement (13.0 vs 18.0). Quick Theory's advantage is device support. On price there is nothing between them.

Both are free to download. Quick Theory sells 3 in-app purchases, starting at $4.99 per month. Paper Trained asks for nothing beyond the download.

## The numbers

| Metric | Paper Trained | Quick Theory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 3 weeks |
| Size | 23 MB | 87 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Flipover Software LLC](https://appshunter.io/developer/1032810042) | [HANOCH YOSEF LIB](https://appshunter.io/developer/6788600007) |

## What reviewers say

### Paper Trained

[App page](https://appshunter.io/ios/app/paper-trained/id6761959743)

**In-app purchases:** none


### Quick Theory

[App page](https://appshunter.io/ios/app/quick-theory/id6790213145)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $29.99 | per year |
| Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Paper Trained free?

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

### Is Quick Theory free?

Quick Theory 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.*