# csBooks vs PDF Library eBook Reader

The clearest difference is review sentiment: csBooks at 100% against PDF Library eBook Reader's 60%. csBooks also leads on update cadence (every 10 days vs monthly) and iOS requirement (15.0 vs 17.0). PDF Library eBook Reader's advantage is ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. csBooks sells 2 in-app purchases, starting at $6.99 per month and PDF Library eBook Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

csBooks ships an update every 10 days, PDF Library eBook Reader monthly. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | csBooks | PDF Library eBook Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (12 ratings)](https://appshunter.io/ios/app/pdf-library-ebook-reader/id6503659712/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | **100.0% of reviews** | 60.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 63 MB | 8 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ravi Kumar Sharma](https://appshunter.io/developer/1695922963) | [Verbia Systems](https://appshunter.io/developer/1025294134) |

## What reviewers say

### csBooks

[App page](https://appshunter.io/ios/app/csbooks-epub-and-pdf-reader/id6477337382)

This app allows users to read and manage ePub and PDF books from their device. It offers features like automatic thumbnail generation, reading progress tracking, customizable text size, and multiple themes for a comfortable reading experience.

**Highlights:** Read ePub and PDF files, Manage book library, Auto book thumbnail generation, Reading progress tracking, Customizable text size and font, 8 stylish reading themes, Cloud storage and desktop sync

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Pro (Monthly) | $6.99 | per month |
| Unlimited Pro (Yearly) | $22.99 | per year |


### PDF Library eBook Reader

[App page](https://appshunter.io/ios/app/pdf-library-ebook-reader/id6503659712)

Effortlessly read, organize, and sync your PDF eBooks across devices. Features include flexible display options, dark mode, auto-save reading progress, and customizable collections. An optional Pro version unlocks advanced organization tools.

**Highlights:** Organize PDF collection, Sync across devices, Flexible display options, Dark mode reading, Auto-save reading progress, Customizable collections (Pro)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Library Pro | $19.99 | one-time |


## Frequently asked questions

### Is csBooks free?

csBooks is free to download, with in-app purchases available.

### Is PDF Library eBook Reader free?

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

### Do csBooks or PDF Library eBook Reader have ads?

csBooks shows ads; PDF Library eBook Reader does not.

### Which is updated more often, csBooks or PDF Library eBook Reader?

csBooks ships an update every 10 days, and PDF Library eBook Reader monthly. Most recently, csBooks was updated on October 12, 2026 and PDF Library eBook Reader on October 24, 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.*