# PDFlow vs Noah

The clearest difference is in-app purchases: PDFlow at none against Noah's 4. Noah's advantage is iOS requirement (15.0.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Noah sells 4 in-app purchases, starting at $5.99 per 6 months. PDFlow asks for nothing beyond the download.

## The numbers

| Metric | PDFlow | Noah |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | — | Every 2 days |
| Size | 9 MB | 74 MB |
| Requires iOS | 17.6 | **15.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [David Villegas](https://appshunter.io/developer/1617174909) | [EIGHT ORDER TECHNOLOGY, K.K.](https://appshunter.io/developer/1753743734) |

## What reviewers say

### PDFlow

[App page](https://appshunter.io/ios/app/pdflow/id6748611572)

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

**In-app purchases:** none


### Noah

[App page](https://appshunter.io/ios/app/noah-ai-assistant/id6756167776)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Light 6 Month | $5.99 | per 6 months |
| Light 1 Month | $6.99 | per month |
| Pro 6 Months | $14.99 | per 6 months |
| Pro 1 Month | $17.99 | per month |


## Frequently asked questions

### Is PDFlow free?

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

### Is Noah free?

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

### Do PDFlow or Noah have ads?

Both PDFlow and Noah show ads.

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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.*