# Uncheck X vs PDFast

The clearest difference is price: Uncheck X at Free against PDFast's $3.99. Uncheck X also leads on device support (4 vs 2). PDFast's advantage is update cadence (every 5 weeks vs every 6 months). On ads, in-app purchases and iOS requirement there is nothing between them.

Uncheck X is free to download; PDFast costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Uncheck X ships an update every 6 months, PDFast every 5 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Uncheck X | PDFast |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Size | 21 MB | 9 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Keisuke Chinone](https://appshunter.io/developer/1586934587) | [Vladimir Rodzaevskiy](https://appshunter.io/developer/1838906311) |

## What reviewers say

### Uncheck X

[App page](https://appshunter.io/ios/app/uncheck-x/id6446932202)

**Features:** Safari Extension, iPhone Duo support

**In-app purchases:** none


### PDFast

[App page](https://appshunter.io/ios/app/pdfast-pdf-tools-and-scanner/id6755842402)

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

**In-app purchases:** none


## Frequently asked questions

### Is Uncheck X free?

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

### Is PDFast free?

PDFast costs $3.99, with no in-app purchases.

### Do Uncheck X or PDFast have ads?

Neither Uncheck X nor PDFast shows ads.

### Which is updated more often, Uncheck X or PDFast?

Uncheck X ships an update every 6 months, and PDFast every 5 weeks. Most recently, Uncheck X was updated on November 3, 2026 and PDFast on October 31, 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.*