# PDF Book Reader vs Carcon Zanzibar

The clearest difference is in-app purchases: Carcon Zanzibar at none against PDF Book Reader's 2. Carcon Zanzibar also leads on ads (none vs shown). PDF Book Reader's advantage is update cadence (every 5 days vs every 11 days) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. PDF Book Reader sells 2 in-app purchases, starting at $3.99 per month. Carcon Zanzibar asks for nothing beyond the download.

PDF Book Reader ships an update every 5 days, Carcon Zanzibar every 11 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | PDF Book Reader | Carcon Zanzibar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (32 ratings)](https://appshunter.io/ios/app/pdf-book-reader/id1576631236/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 63.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 9 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [B TO J PTY LTD](https://appshunter.io/developer/569308231) | [SIG IT solutions s.r.o.](https://appshunter.io/developer/1779918838) |

## What reviewers say

### PDF Book Reader

[App page](https://appshunter.io/ios/app/pdf-book-reader/id1576631236)

Easily read, manage, and annotate PDF books and documents. This app offers a smooth reading experience, powerful annotation tools, and seamless cloud integration. Organize, search, and share your PDFs with ease.

**Highlights:** Natural PDF reading and navigation, PDF bookmarking and annotation, Text search and OCR extraction, PDF merging and page rearrangement, Cloud storage integration (Google Drive, Dropbox, iCloud), File import and export via cloud and Files app, PDF sharing and printing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $3.99 | per month |
| 1 Year Subscription | $28.99 | per year |


### Carcon Zanzibar

[App page](https://appshunter.io/ios/app/carcon-zanzibar/id6738277701)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Book Reader free?

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

### Is Carcon Zanzibar free?

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

### Do PDF Book Reader or Carcon Zanzibar have ads?

PDF Book Reader shows ads; Carcon Zanzibar does not.

### Which is updated more often, PDF Book Reader or Carcon Zanzibar?

PDF Book Reader ships an update every 5 days, and Carcon Zanzibar every 11 days. Most recently, PDF Book Reader was updated on November 3, 2026 and Carcon Zanzibar on November 4, 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.*