# PDF AI vs Fast PDF Editor

The clearest difference is in-app purchases: Fast PDF Editor at none against PDF AI's 6. Fast PDF Editor also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. PDF AI sells 6 in-app purchases, starting at $9.99 per month. Fast PDF Editor asks for nothing beyond the download.

PDF AI ships an update every 3 days, Fast PDF Editor every 2 days. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PDF AI | Fast PDF Editor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 142 MB | 76 MB |
| Requires iOS | 15.5 | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saad Ameen](https://appshunter.io/developer/1680660990) | [雅丽 银](https://appshunter.io/developer/1838360177) |

## What reviewers say

### PDF AI

[App page](https://appshunter.io/ios/app/pdf-ai-edit-read-and-analyse/id6763019243)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic Monthly Subscription | $9.99 | per month |
| Remove Ads Forever | $9.99 | one-time |
| 1500 AI Credits | $9.99 | one-time |
| 2500 AI Credits | $14.99 | one-time |
| 4000 AI Credits | $19.99 | one-time |
| 10000 AI Credits | $29.99 | one-time |


### Fast PDF Editor

[App page](https://appshunter.io/ios/app/fast-pdf-editor/id6788446893)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF AI free?

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

### Is Fast PDF Editor free?

Fast PDF Editor is free to download, with no in-app purchases.

### Do PDF AI or Fast PDF Editor have ads?

PDF AI shows ads; Fast PDF Editor does not.

### Which is updated more often, PDF AI or Fast PDF Editor?

PDF AI ships an update every 3 days, and Fast PDF Editor every 2 days. Most recently, PDF AI was updated on October 11, 2026 and Fast PDF Editor on October 12, 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.*