# KyBook - EPub,FB2,PDF,DjVu Reader

> Books

Canonical page: [https://chrome-stats.com/d/id673027171](https://chrome-stats.com/d/id673027171)

## Overview

- **ID:** `id673027171`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Konstantin Bukreev
- **Category:** Books
- **Rating:** 4.40 / 5 (466 ratings)
- **Version:** 2.1.6
- **Last updated:** 2016-06-03
- **First published:** 2013-08-09
- **Size:** 50 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/kybook-epub-fb2-pdf-djvu-reader/id673027171)
- **Website:** [http://kolyvan.com/kybook/](http://kolyvan.com/kybook/)

## Description

KyBook is a modern Chrome extension reader that supports EPUB, FB2, PDF, DJVU, CHM, CBR/CBZ, TXT, and more. It integrates OPDS catalogs, cloud storage (Google Drive, Dropbox, OneDrive, Yandex Disk), and popular services, plus flexible reading modes (font, theme, size, alignment, line height, margins, hyphenation) and easy navigation via table of contents, bookmarks, and notes.

It offers library organization with shelves and subjects, full-screen reading, orientation lock, brightness control, dictionaries, translation, and text-to-speech. It also includes a built-in web browser, ZIP/RAR/archive support, WebDAV, Tor network, and social integrations. Note: some advanced features such as DJVU, CHM, Tor access, and Speed Reading require upgrading to Pro via in-app purchase, available during the trial period.

## Rankings

- #76,710 — Overall
- #34 — pdf
- #50 — reader

## Review summary

KyBook is praised for its intuitive UI, strong search, and useful features like notes, bookmarks, and password-protected folders. The free version works for some audiobook use. Common drawbacks include unreliable synchronization across devices and cloud storage issues, lack of ongoing maintenance or OS compatibility with newer devices, usability problems after updates, and limited developer responsiveness.

### Pros

- Easy to use with intuitive navigation and design
- Strong in-app search, highlighting, and bookmarking features
- Rich features: easy import, word-level notes, bookmarking, and old-school page flip
- Password-protected folders for library security
- Free version meets needs for audiobooks / basic use

### Cons

- Unreliable cross‑device synchronization and premium sync features
- Lack of updates and compatibility with newer iOS devices / OS updates
- Usability issues or not user-friendly after updates
- Google Drive/Dropbox integration and cloud access problems
- Inconsistent developer support or responsiveness

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- [TotalReader for iPad - The BEST eBook reader for epub, fb2, pdf, djvu, mobi, rtf, txt, chm, cbz, cbr](https://chrome-stats.com/d/id738947612) — 3.20 / 5
- [TotalReader - ePub, DjVu, MOBI, FB2 Reader](https://chrome-stats.com/d/id832489932) — 4.30 / 5
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Source: [Chrome-Stats](https://chrome-stats.com/d/id673027171)