# csBooks - ePub and PDF reader — Read ePub Mobi PDF and Comics

> ePub and PDF reader and manager with library organization and reading customization. (iPhone/iPad app by Ravi Kumar Sharma.)

- Source: https://appshunter.io/ios/app/csbooks-epub-and-pdf-reader/id6477337382 (this page in markdown: same URL + `.md`)
- Developer: [Ravi Kumar Sharma](https://appshunter.io/developer/1695922963)
- Category: Books, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 84 MB
- Languages: American English
- Released: 2025-01-14
- Data updated: 2026-08-17
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/csbooks-epub-and-pdf-reader/id6477337382/reviews.md

## What is csBooks?

Read ePub, PDF, MOBI, Word & CBZ files with csBooks – the best ebook reader and digital library manager for iPhone and iPad. Import, organize, and read books offline with our all-in-one book reader app.

The #1 ebook reader app for offline and online reading:

ePub reader & ePub viewer
PDF reader & PDF viewer
MOBI reader & MOBI viewer
CBZ comic book reader
Word document reader (DOCX)

Book Reader Features:

ePub reader with adjustable fonts, text size & 8 reading themes
PDF reader with page progress tracking & navigation
MOBI ebook reader for Kindle-format files
Comic book reader for CBZ files
Book library manager with card view & list view
Auto-generated book cover thumbnails
Reading progress tracker
Cloud sync & cloud backup for your ebook library
Offline reading – read books without internet
Import ebooks from Files, email & cloud storage
Desktop sync for cross-device reading

Best ebook reader for digital library management. csBooks organizes your ePub books, PDF books, MOBI ebooks, and comic books in one beautiful reading app. Fast ePub viewer, smooth PDF viewer, and full-featured book manager.
Read ebooks offline. Sync your book library to desktop. Track reading progress. csBooks is the ebook reader and library app for serious readers.
Download csBooks – ebook reader, PDF viewer & digital library app.

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Developer contact: studiocaesium@gmail.com
Privacy Policy: https://www.caesiumstudio.com/privacy-policy
End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited Pro (Monthly) | $6.99 | per month |
| Unlimited Pro (Yearly) | $22.99 | per year |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/csbooks-epub-and-pdf-reader/id6477337382/reviews.md

### 5/5 — Good App

*2025-09-23, version 8*

Good App

### 5/5 — Great app!!

*2025-01-15, version 1.0*

Easy to use and nice usecase.

## Frequently asked questions about csBooks

### What file formats does csBooks support?

csBooks supports reading ePub, PDF, and Mobi file formats. You can import these files directly from your device.

### Can I customize the reading experience in csBooks?

Yes, csBooks allows you to change the book text size and font to suit your eyes. It also offers 8 stylish themes for a comfortable reading experience.

### Does csBooks track my reading progress?

csBooks automatically detects and tracks your reading progress for both ePub and PDF books, including your current page in PDF files.

### How does csBooks manage my book library?

csBooks automatically generates thumbnails for book covers upon import, allowing you to view your ePub files by their cover. It supports both card and list views for your books.

### Is my imported book data secure with csBooks?

Yes, when you import ePub and PDF book files, csBooks saves them in secure cloud storage. These files can also be synced with the desktop application.

### What are the subscription options for csBooks?

csBooks offers an 'Unlimited Pro' subscription with monthly and yearly plans. The monthly plan costs $6.99 per month, and the yearly plan is $22.99 per year.

### Does csBooks have ads?

Yes, csBooks contains advertisements. This is a common model for free applications that offer in-app purchases for enhanced features.

### What devices is csBooks available on?

csBooks is available on iPhone, iPad, and iPod devices, indicated by its support for these platforms.

## Version history (last 5 releases)

### 15 — 2026-05-31

Get ready for a smoother reading experience! We've polished up the user interface to make navigating your books even more intuitive. Plus, dive into our new Book Metadata Editor to personalize your library and tweak Text Library Settings for ultimate control. We've also squashed some pesky bugs for a more stable experience.

### 14 — 2026-05-29

Spruce up your library with new book cover customization options! Now you can fine-tune how your books look on your shelf with adjustable distances and cover sizes in each row. Plus, enjoy a sleek, modern UI for EPUB reader settings and a whole host of new themes to personalize your reading experience. We've also added the ability to edit book metadata, making it easier than ever to keep your collection organized.

### 13 — 2026-04-18

Now you can delete a saved book

### 12 — 2026-04-17

Save audio book progress
Resume listening where you paused

### 11 — 2026-04-15

Librivox public domain audio books

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| --- | --- | --- | --- |
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## More apps by Ravi Kumar Sharma

- [Piano - Real Sounds Keyboard](https://appshunter.io/ios/app/piano-real-sounds-keyboard/id6450960532)
- [Harmonium - Real Sounds (Raga)](https://appshunter.io/ios/app/harmonium-real-sounds-raga/id6451088024)
- [Tabla - Classical Drums](https://appshunter.io/ios/app/tabla-classical-drums/id6451099152)
- [Vittly: Track Expense & Budget](https://appshunter.io/ios/app/vittly-track-expense-and-budget/id6451216567)
- [Flitm: online learning courses](https://appshunter.io/ios/app/flitm-online-learning-courses/id6452400407)
- [Raga Melody Classical Music](https://appshunter.io/ios/app/raga-melody-classical-music/id6476657451)

All apps by Ravi Kumar Sharma: https://appshunter.io/developer/1695922963

## Related topics

[epub pdf reader](https://appshunter.io/ios/topics/epub-pdf-reader)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*