# PDF Book Reader vs AvokaidCSR II

The clearest difference is rating: AvokaidCSR II at 5.0 against PDF Book Reader's 3.9. AvokaidCSR II also leads on in-app purchases (none vs 2) and ads (none vs shown). PDF Book Reader's advantage is update cadence (every 5 days vs every 5 weeks) and ratings volume (32 vs 1). 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. AvokaidCSR II asks for nothing beyond the download.

AvokaidCSR II holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: PDF Book Reader has 32 ratings behind it against 1, so its average is the more settled of the two.

PDF Book Reader ships an update every 5 days, AvokaidCSR II every 5 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | PDF Book Reader | AvokaidCSR II |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (32 ratings)](https://appshunter.io/ios/app/pdf-book-reader/id1576631236/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/avokaidcsr-ii/id1641870767/reviews)** |
| Number of ratings | **32** | 1 |
| Positive reviews | 63.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 46 MB | 44 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [B TO J PTY LTD](https://appshunter.io/developer/569308231) | [Avokaid LLC](https://appshunter.io/developer/1623627165) |

## 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 |


### AvokaidCSR II

[App page](https://appshunter.io/ios/app/avokaidcsr-ii/id1641870767)

This mobile app allows users to access and manage new patient information. It provides a streamlined way to handle patient data on the go. Designed for efficiency in healthcare settings.

**Highlights:** Access patient information, Manage new patient data, Streamlined data handling, Mobile accessibility

**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 AvokaidCSR II free?

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

### Which has better reviews, PDF Book Reader or AvokaidCSR II?

AvokaidCSR II is rated higher. PDF Book Reader averages 3.9 out of 5 from 32 ratings, while AvokaidCSR II averages 5.0 from 1 ratings.

### Do PDF Book Reader or AvokaidCSR II have ads?

PDF Book Reader shows ads; AvokaidCSR II does not.

### Which is updated more often, PDF Book Reader or AvokaidCSR II?

PDF Book Reader ships an update every 5 days, and AvokaidCSR II every 5 weeks. Most recently, PDF Book Reader was updated on November 3, 2026 and AvokaidCSR II on November 3, 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.*