KyBook - EPub,FB2,PDF,DjVu Reader

Name: KyBook - EPub,FB2,PDF,DjVu Reader
Rating: 4.4 (464 reviews)
Author: Konstantin Bukreev

By: Konstantin Bukreev

Books

Features & Capabilities

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.

User Growth & Download Statistics

App Books Education Privacy & Security

By:

Konstantin Bukreev

Rating:

4.40

(464)

Version:

2.1.6 Last updated: 2016-06-03

Version code:

841437037

Creation date:

2013-08-09

Compatible devices:

Size:

49.64MB

URLs:

Website

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-14

Compare stats and ranking:

Ranking

# 83,003 ▼ 167

Other rankings

#89 in pdf keyword 73 ▲

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Konstantin Bukreev

Apple Apps Store

https://apps.apple.com/us/app/kybook-epub-fb2-pdf-djvu-reader/id673027171

Website:

http://kolyvan.com/kybook/

User Reviews

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

Recent reviews

Got a lot of epub files in a couple of directories on my iPad. Cannot find a way to navigate to these folders to open them. Tried the file ‘open with’ option by KY Book isn’t a choice. GuessI will find another app

by gi*****, 2025-11-05

It's almost impossible to find an app that works on my IPad, but this app works just fine. Thanks to the developers!

by El*****, 2025-07-26

First, I was giving up on finding a good app for reading, I didn’t find any scrolling like watt pad, but this one is so much better!!! You can look up the definition in the app and translate words without making it a big deal or download any other app. The design is good and simple, just a good app! Recommended!!!!