# PDF Book Reader vs Kalstein Plus

The clearest difference is in-app purchases: Kalstein Plus at none against PDF Book Reader's 2. Kalstein Plus also leads on ads (none vs shown). PDF Book Reader's advantage is iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

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

## The numbers

| Metric | PDF Book Reader | Kalstein Plus |
| --- | --- | --- |
| 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 | — |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 0 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [B TO J PTY LTD](https://appshunter.io/developer/569308231) | [Yul Gary](https://appshunter.io/developer/1870919470) |

## 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 |


### Kalstein Plus

[App page](https://appshunter.io/ios/app/kalstein-plus/id6758107172)

**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 Kalstein Plus free?

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

### Do PDF Book Reader or Kalstein Plus have ads?

PDF Book Reader shows ads; Kalstein Plus does not.

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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.*