# PDF Document Editor, Read Book vs Qualus

The clearest difference is in-app purchases: Qualus at none against PDF Document Editor, Read Book's 6. PDF Document Editor, Read Book's advantage is update cadence (every 9 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Document Editor, Read Book sells 6 in-app purchases, starting at $1.99 per 7 days. Qualus asks for nothing beyond the download.

PDF Document Editor, Read Book ships an update every 9 days, Qualus every 2 months. The most recent releases landed on December 13, 2025 and August 19, 2026 respectively.

## The numbers

| Metric | PDF Document Editor, Read Book | Qualus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 33 MB | 38 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Oleksandr Bilyk](https://appshunter.io/developer/1588574362) | [Kanishka Software Pvt. Ltd.](https://appshunter.io/developer/1464881024) |

## What reviewers say

### PDF Document Editor, Read Book

[App page](https://appshunter.io/ios/app/pdf-document-editor-read-book/id6504371765)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Editor: PDF Reader, Sign | $1.99 | per 7 days |
| PDF Editor: PDF Reader, Sign | $2.99 | per 7 days |
| PDF Editor: PDF Reader, Sign | $5.99 | per month |
| PDF Editor: PDF Reader, Sign | $6.99 | per month |
| PDF Editor: PDF Reader, Sign | $24.99 | per year |
| PDF Editor: PDF Reader, Sign | $34.99 | per year |


### Qualus

[App page](https://appshunter.io/ios/app/qualus/id6575380569)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Document Editor, Read Book free?

PDF Document Editor, Read Book is free to download, with in-app purchases available.

### Is Qualus free?

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

### Do PDF Document Editor, Read Book or Qualus have ads?

Neither PDF Document Editor, Read Book nor Qualus shows ads.

### Which is updated more often, PDF Document Editor, Read Book or Qualus?

PDF Document Editor, Read Book ships an update every 9 days, and Qualus every 2 months. Most recently, PDF Document Editor, Read Book was updated on December 13, 2025 and Qualus on August 19, 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.*