The best way to read your books ever!

KyBook supports all the major e-book formats, OPDS catalogs and Cloud Storage.
Continuously developing and improving in close contact with thousands of KyBook users.

Key features:

- EPUB, FB2, RTF, PDF, DJVU, MOBI, AZW3, CBR, CBZ, CBT, MP3, M4A, M4B formats
- OPDS catalogs

- Cloud Storage
- Flexible reading mode settings
- Handy cataloguer
- Text-to-speech technology


- Supports e-books in EPUB (DRM-free), FictionBook (fb2, fbz,, TXT, RTF, PDF, DJVU, Comic Book (cbr, cbz, cbt), MobiPocket (mobi), Kindle (azw3), and Audio Book (mp3, m4a, m4b) formats.
- Provides access to enormous collection of free electronic books through OPDS-catalogs support.
- Finds books in your Cloud Storage or anywhere in Internet.
- Saves your books into iCloud, Dropbox, Yandex Disk, Google Drive, OneDrive, Cloud, ownCloud (WebDAV) and Shared folders (SMB/CIFS).
- Allows customize: font, colour theme, text size, text alignment mode, margins, paragraph indention, hyphenations and more.
- Provides easy navigation inside the book using table of content, bookmarks or notes.
- Helps organizing your books, cataloging them, grouping and sorting in different modes.
- Provides detailed information about each of your book.
- Allows choosing book covers from different sources, changing titles and subjects and even more.
- Uses text-to-speech technology to voice any e-book.
- Supports translation of text and the vocabularies in StarDict and Lingvo DSL format.
- Integrates with social networking services.
- Supports of archives in ZIP, RAR and TAR format.
- Provides Speed Reading.
- Allows to stream audio for audio books in Cloud Storage.
- Supports fuzzy search and search using regular expressions in a text book.
- Supports automatic text summarization and precis-writing.
- Supports preview of iWork, Microsoft Office, CSV, HTML files.

Dear users, KyBook 2 is a further development of the project KyBook.
Major innovations: new engines for epub/fb2 ebook formats. Heavily modified engines for pdf/djvu.
A new way for cataloging books and cloud storage interaction. iCloud support for a storing e-books and a metadata synchronization.

What's New

Version 1.1.0

Fixed an error occurring when using the translation service.

Customer Reviews

4.7 out of 5

421 Ratings

421 Ratings

This app works really well with iPad Pro

Katya 💕1267659

I own a lot of ebooks with a fundamental problem: some books just don’t view well on my small iPhone screen. These include: art books, comic books and graphic novels, photography books, books on crafts such as sewing and cooking and needlework, etc. For books with heavy graphic content or lots of pictures, I put them on my iPad Pro with 12” screen, and I use this app to view my books. It displays the pictures in glorious color. If you have problems with your eReader cutting your pictures in half on two pages, I recommend this app.

This replaced iBooks

Lj 12345678901234567890

Ever seen ios11 iBooks has been full of bugs on my phone, iPad and Mac. I found KyBook 2 and love it. Does everything iBooks does except no bugs. Only thing missing is highlight with Apple Pencil built in. Otherwise it syncs better, much better organization. It also allows greater control of Library and files. Please developer release kybook 3. I’m very excited. Would gladly pay for it. Already gave the 4$ for the pro

Simply awesome!😃


Massive text formatting options, fully customizable interface, AND it syncs notes, highlights, bookmarks, and reading position across iOS devices. In addition, you can use a Bluetooth keyboard or presentation remote to control the page turns. This is the app I’ve been waiting for! All other ebook apps don’t even come close. Seriously, if you love reading ebooks, get this.


Konstantin Bukreev
51.5 MB
Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch.
English, German, Greek, Russian
Age Rating
You must be at least 17 years old to download this app.
Unrestricted Web Access
© Konstantin Bukreev
In-App Purchases
  1. Upgrade to Pro Version $3.99
  2. Upgrade to Pro Version $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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