iPhone Screenshots


iPad Screenshots



Attention, since October 1, 2019, the third edition of the application is available on the App Store - KyBook 3 Reader.
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, fb2.zip), 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 Mail.ru, 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.

What's New in Version 1.2.8

- Fixed crash when using the translation service in iOS 9.
- Few minor improvements.



Konstantin Bukreev






53.2 MB

Game Center


VPP Device Licensing



Rated 17+ for the following:
Unrestricted Web Access


iOS 8.1 or later


iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XR, iPhone XS, iPhone XS Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone SE (2nd generation), iPad 2 (Wi-Fi), iPad 2 (3G), iPad (3rd Generation) (Wi-Fi), iPad (3rd Generation) (4G), iPad (4th Generation) (Wi-Fi), iPad (4th Generation) (4G), iPad (5th Generation) Wi-Fi, iPad (5th Generation) Wi-Fi + Cellular, iPad (6th generation) Wi-Fi, iPad (6th generation) Wi-Fi + Cellular, iPad Pro, iPad Pro (Cellular), iPad Pro (9.7-inch), iPad Pro (9.7-inch) (Cellular), iPad Pro 12.9-inch (2nd generation), iPad Pro 12.9-inch (2nd generation) Wi-Fi + Cellular, iPad Pro (10.5-inch), iPad Pro (10.5-inch) Wi-Fi + Cellular, iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro 12.9-inch (3rd generation), iPad Pro 12.9-inch (3rd generation) Wi-Fi + Cellular, iPad Air, iPad Air (Cellular), iPad Air 2, iPad Air 2 (Cellular), iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPad mini (Wi-Fi), iPad mini (4G), iPad mini Retina, iPad mini Retina (Cellular), iPad mini 3, iPad mini 3 (Cellular), iPad mini 4, iPad mini 4 (Cellular), iPad mini (5th Generation), iPad mini (5th Generation) Wi-Fi + Cellular, iPad (7th generation) Wi-Fi, iPad Pro 11-inch (2nd generation), iPad Pro 11-inch (2nd generation) Wi-Fi + Cellular, iPad Pro 12.9-inch (4th generation), iPad Pro 12.9-inch (4th generation) Wi-Fi + Cellular, iPod touch (5th generation), iPod touch (6th Generation), iPod touch (7th generation)


English, German, Greek, Russian

Customer Ratings

All Versions

243 Ratings

Customer Reviews

Unwanted undeletable folders

Version 1.2.8
Using iPhone and windows 10
Uninstalled Ky 2 but it left a locked folder in my iCloud Drive that only appears in my windows 10 iCloud directory. Can’t move it can’t delete it.
Help section of website is useless - there’s no way to submit a q without giving away more personal information. Not happening.
Happy to adjust the review if the devs help me out

Great book reader

mr dictionnaire
Version 1.2.8
I like it very much!....really fantastic book reader

Good app

Version 1.2.8
I have this app about two yeas and so far I didn’t see something better for my use. I like this app.


Version 1.2.8
Invasive ads, flashy and distracting and irrelevant.

Good really good

Version 1.2.8
Love pinch to resize text. So quick and easy. Tried others and this ereader is great.

Ads on the reading screen

Version 1.1.0
It was tolerable in the menus, but not on the reading screen now.
Not my favorite ereader any more.
Very disappointed. Paid for Kybook1Pro and expected at least the absence of ads in the 2 version in the reading area.

Best E-book reader - holy c*ap!!

Version 1.1.0
This book has absolutely everything I was looking for in an E-book reader and sooo much more!!
I was just looking to replace iBooks with something that let me annotate PDFs, including locked PDFs. This app though - it has EVERYTHING. It has every feature iBooks has and extras - there’s a dictionary, text size, font, margins, night mode, pages or continuous scrolling, and even text to speech!!!
And this app lets you import books from anywhere - which is next to impossible for an iPhone app, with the annoying complex iBooks / iCloud / iTunes sync system. Highly highly recommended!!!

What iBooks could have been...

Feathers Stevens
Version 1.1.0
and should have been.
Nice work Kybooks! Thanks!

best and only mobi reader to get!

Version 1.1.0
This does everything the other mobi readers do plus everything else that all the PDF and ePub readers do. It is the app to pay for — other mobi readers are dishonest and since you cannot try before you buy on the app store I have been duped before. Not with KyBook. My only real complaint is with the app store itself: I have searched for mobi readers before and all the other junk ones rank far higher in the search results. I barely found this one and it is the one I wanted!!! 5 stars for this app, 1 star for the bad-faith app store.

Best but old!

Version 1.1.0
No doubt that Kybook2 is the best eBook reader on the Appstore but it’s getting really old. I’m receiving odd error messages in cloud book layout like ‘request time out’ ,‘url not supported’ , file not found , ... please solve these problems. Also bing translation gives an error and is not working anymore. Some epubs does not show up correctly , it looks that the epub engine is old too .The program really needs an update or I’ll switch to Marvin3 . Please either update the current version or release kybook 3 as soon as possible. I’m ready to but it ( no subscription just one time purchase , I don’t pay even 1 penny for subscription based apps).

Very configurable

Version 1.1.0
So much better than iBooks in its ability to tweak the reading experience.


Version 1.1.0
Love this app! Does eveything I need it to!!

Best reader I found so far

Cristian Bobeica
Version 1.1.0
This is the best reader I found so far! Thank you!

Beautiful Layout

Version 1.1.0
I really enjoy this app, great way to view alternative not-so-popular reading formats!

Best reader I've found thus far...

Version 1.1.0
Kyreader has every advantage I've seen offered in other readers but without the annoying ads or pop ups asking you to purchase a pro version. Though it's still new to me I've found no faults and am very happy to have found it. Well done and thank you to the creator of this well written programme, keep up the great work.

Perhaps the best

Version 1.0.8
Readers abound, yet so much on the net isn't worth reading. When there is something worth reading though, Kybook is perhaps one of the best instruments with which to read it. By comparison, the Apple bookshelf feels repressive, and the simple access and integration to spoken text is enjoyed often while resting my eyes.
Access to multiple library sources is also done well.
The overall flow of usability is not perfect, but no other reading app is better imho. If the author smooths out the interface somewhat, then this app will be a home run.

Overall an excellent app!

Version 1.0.7
Nice and fast, easy to adjust, good access to libraries. The only issue I've had is some errors when searching. Other than that, a good product!


Love dogs 24
Version 1.0.6
Wonderful app that does exactly as it says couldn't be more happy!

Great e-reader

Version 1.0.5
Absolutely great, wish it integrated with goodreads though!

Almost there

Version 1.0.4
If only one could adjust (text) brightess sliding one finger vertically on page &
tap right or left side of page to turn page forward or back with horizontal scroll...
then KyBook would grow to be a serious alternative to legendary Stanza (rip)...

My favourite e-reader

Version 1.0.2
I've tried a lot of e-readers and this is my favourite. I especially appreciate the ability to access my books on Dropbox and Google Drive from within the app.

The best reader app

Version 0.9.7
This is the best reader app in the App Store, bar none. Seriously, it's that good and it's getting better, since the developer is actively supporting it.