i2Reader vs csBooks
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i2Reader
This app is an award-winning eBook reader supporting a wide range of formats including EPUB, PDF, and MOBI. It offers customizable styles, dictionary integration, and convenient ways to upload books via FTP, web server, or Calibre.
- Supports EPUB, PDF, RTF, HTML, FB2, MOBI, DOC, text
- Customizable styles and dictionary support
- Built-in FTP and Web servers for book uploads
- Calibre integration for book management
- Custom PDF reformatting engine
- Autoscroll and auto-hyphenation
- Integrated web browser for book downloads
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i2Reader is an innovative and award-winning eBook reader! Among the features: - Support of EPUB (DRM-free), PDF, RTF, HTML, FB2, MOBI, DOC and plain text formats; - Customizable styles; - Dictionary support (starDict format) for quick word lookup; - Extremely user-friendly interface; - One-way built-in FTP server to upload books and dictionaries to i2Reader; - One-way built-in Web server to upload books and dictionaries from your computer; - Support for cross-platform Calibre tool to upload books to i2Reader; - Custom-made PDF rendering engine that reformats the text from PDFs for easier reading on the iPhone screen; - Autoscroll; - Auto-hyphenation; - Display and save of inline images in the books; - Integrated Web browser to quickly download books from the Internet; - Bookmarks; - Table of Contents; - Landscape and fullscreen modes; - Book groups.
csBooks
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.
- 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
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Read ePub, PDF, MOBI, Docx, CBZ, CBR, DJVU and MOBI book 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. ------- 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
Screenshots
Verdict
The clearest difference is review sentiment: csBooks at 100% against i2Reader's 47%. csBooks also leads on update cadence (every 10 days vs every 2 months). i2Reader's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. csBooks sells 2 in-app purchases, starting at $6.99 per month. i2Reader asks for nothing beyond the download.
i2Reader ships an update every 2 months, csBooks every 10 days. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.
| Parameter | i2Reader | csBooks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (15 ratings) — better | — |
| Positive reviews | 47.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 15 — better | — |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 25 MB | 63 MB |
| Age rating | 17+ | 4+ |
| Developer | Yuriy Melyushin | Ravi Kumar Sharma |
Customer experience
i2Reader
csBooks
In-app purchases
i2Reader
No in-app purchases
csBooks
- Unlimited Pro (Monthly)$6.991 Month
- Unlimited Pro (Yearly)$22.991 Year
