KyBook Downloads & RevenueKyBook - EPub,FB2,PDF,DjVu Reader · App Store
KyBook - EPub,FB2,PDF,DjVu Читалка
KyBook - EPub,FB2,PDF,DjVu Reader is #25 in Books Grossing in Russia and charting in 1 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperKonstantin Bukreev
CategoryBooks
PriceFree
Released
Rating★ 4.6 (6.7k)
Version2.1.6
Age rating17+
First seen by us
25 Sep 2026
25 Sep 2026Installs (est.)500k+ worldwide
KyBook - EPub,FB2,PDF,DjVu Reader update history & changes
Last change · 6 events since 8 Aug 2013Full timeline ↓🔎Top 10 for “reader”📈Entered the top 100🔎Top 10 for “reader”🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 5 events in the last 12 months
- 🔎KyBook - EPub,FB2,PDF,DjVu Reader reached Top 10 for “reader”#10 in Netherlands search · popularity 32
- 📈KyBook - EPub,FB2,PDF,DjVu Reader entered the top 100Top Grossing · Books · RU
- 🔎KyBook - EPub,FB2,PDF,DjVu Reader reached Top 10 for “reader”#9 in Turkey search · popularity 30
- 🆕KyBook - EPub,FB2,PDF,DjVu Reader first spotted by AppInsider#79 in Top Free · Books · Russia
- 🆕KyBook - EPub,FB2,PDF,DjVu Reader released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.6 ★
6.7k ratings
Measured
Best rank now
#25
Books GrossingMeasured
New ratings a week
1.8
App Store, 4-week average
Measured
KyBook - EPub,FB2,PDF,DjVu Reader on the App Store
App details
App ID
673027171
Publisher
Konstantin Bukreev
On the store since
Aug 2013
13 years on the store
Minimum OS
iOS 8.0+
iPhone 4s and later
Devices
iPhone · iPad
Universal purchase
Content rating
17+
4 content notes below
Languages
26
CA CS DA NL EN FI FR DE EL HE HU ID …
Size
52 MB
Also listed in
Books, Education
Content notesInfrequent/Mild Cartoon or Fantasy ViolenceUnrestricted Web AccessInfrequent/Mild Horror/Fear ThemesInfrequent/Mild Profanity or Crude Humour
KyBook - EPub,FB2,PDF,DjVu Reader downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where KyBook - EPub,FB2,PDF,DjVu Reader's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Russia | BooksGrossing | #25 |
| Russia | BooksFree | #160 |
Apps near KyBook - EPub,FB2,PDF,DjVu Reader on the chart
Books Grossing, around #25.
Ratings
App Store, worldwide.
Rating
4.6 ★
6.7k ratings
Measured
Ratings
6.7k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
1.8
4-week average
Lifetime rating
4.6★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
64/100
faster than 73% of Books apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About KyBook - EPub,FB2,PDF,DjVu Reader
KyBook is a modern reader application for e-books.
It has highly customizable and friendly interface and also:
Key features:
- EPUB, FB2, RTF, PDF, DJVU, CHM, CBR, CBZ, MP3, M4A, M4B formats
- OPDS catalogs and network folders
- Google Books, Google Drive, Dropbox, OneDrive, Yandex Disc
- Flexible reading mode settings
Complete feature list:
- Supports e-books in EPUB, FictionBook (fb2, fbz, fb2.zip), TXT, RTF, PDF, DJVU, CHM, Comic Book (cbr, cbz) and Audio Book (mp3, m4a, m4b) formats.
- Has wide opportunities in searching and downloading e-books from different sources.
- Provides access to enormous collection of free electronic books through OPDS-catalogs support.
- Downloads e-books with the help of Web Browser (Mobile Safari), e-mail or iTunes.
- Saves your books into cloud storages and network folders.
- Integrated with Google Books, Google Drive, Dropbox, OneDrive and Yandex Disc.
- Allows flexible setting of text displaying: font selection, colour theme, text size, text alignment mode, line height, margins, paragraph indention and hyphenations.
- Allows choosing book covers from different sources, changing titles and subjects.
- Provides easy navigation inside the book using table of content, bookmarks or notes.
- Helps organizing your books on shelves, cataloging them under subjects and sorting in different modes.
- Has full-screen reading mode in landscape and portrait orientation.
- Allows turning and scrolling pages in vertical or horizontal mode.
- Allows locking orientation and changing screen brightness.
- Supports dictionaries, translation of selected text and text-to-speech.
- Integrated with social networking services (Facebook, Twitter, Vkontakte)
- Supports of VK Docs as Cloud Storage
- Built-in Web Browser
- Supports Tor Network
- DJVU and PDF filters
- Support of archives in ZIP and RAR format
- Password-protected Bookshelves
- Speed Reading (RSVP)
- Automatic text summarization
- Integrated with LitRes.ru
- Integrated with Samizdat (samlib.ru)
- Supports WebDAV protocol
Dear users, DJVU, CHM, Tor Network and 'Speed Reading' requires in-app purchase "Upgrade to Pro Version".
You are free to use these features during the trial period. After the trial period You can unlock them via upgrading KyBook to Pro Version.
It has highly customizable and friendly interface and also:
Key features:
- EPUB, FB2, RTF, PDF, DJVU, CHM, CBR, CBZ, MP3, M4A, M4B formats
- OPDS catalogs and network folders
- Google Books, Google Drive, Dropbox, OneDrive, Yandex Disc
- Flexible reading mode settings
Complete feature list:
- Supports e-books in EPUB, FictionBook (fb2, fbz, fb2.zip), TXT, RTF, PDF, DJVU, CHM, Comic Book (cbr, cbz) and Audio Book (mp3, m4a, m4b) formats.
- Has wide opportunities in searching and downloading e-books from different sources.
- Provides access to enormous collection of free electronic books through OPDS-catalogs support.
- Downloads e-books with the help of Web Browser (Mobile Safari), e-mail or iTunes.
- Saves your books into cloud storages and network folders.
- Integrated with Google Books, Google Drive, Dropbox, OneDrive and Yandex Disc.
- Allows flexible setting of text displaying: font selection, colour theme, text size, text alignment mode, line height, margins, paragraph indention and hyphenations.
- Allows choosing book covers from different sources, changing titles and subjects.
- Provides easy navigation inside the book using table of content, bookmarks or notes.
- Helps organizing your books on shelves, cataloging them under subjects and sorting in different modes.
- Has full-screen reading mode in landscape and portrait orientation.
- Allows turning and scrolling pages in vertical or horizontal mode.
- Allows locking orientation and changing screen brightness.
- Supports dictionaries, translation of selected text and text-to-speech.
- Integrated with social networking services (Facebook, Twitter, Vkontakte)
- Supports of VK Docs as Cloud Storage
- Built-in Web Browser
- Supports Tor Network
- DJVU and PDF filters
- Support of archives in ZIP and RAR format
- Password-protected Bookshelves
- Speed Reading (RSVP)
- Automatic text summarization
- Integrated with LitRes.ru
- Integrated with Samizdat (samlib.ru)
- Supports WebDAV protocol
Dear users, DJVU, CHM, Tor Network and 'Speed Reading' requires in-app purchase "Upgrade to Pro Version".
You are free to use these features during the trial period. After the trial period You can unlock them via upgrading KyBook to Pro Version.
Latest updates
2.1.6
Fixed minor bugs.
Thank you for using KyBook!
Please remember to update your reviews.
