KyBook 2 Ebook Reader Downloads & RevenueKyBook 2 Ebook Reader · App Store
KyBook 2 Читалка для книг
KyBook 2 Ebook Reader is #77 in Books Free 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★ 4.7 (19k)
Version1.2.8
Age rating17+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)1M+ worldwide
KyBook 2 Ebook Reader update history & changes
Last change · 4 events since 12 Oct 2015Full timeline ↓Full timeline · 3 events in the last 12 months
- 📈KyBook 2 Ebook Reader charting in a new countryChina
- 🆕KyBook 2 Ebook Reader first spotted by AppInsider#83 in Top Grossing · Books · Russia
- 🆕KyBook 2 Ebook 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
4.7 ★
19k ratings
Measured
Best rank now
#77
Books FreeMeasured
New ratings a week
3.8
▲ +12% vs the 2 weeks before
Measured
KyBook 2 Ebook Reader on the App Store
App details
App ID
1018584176
Publisher
Konstantin Bukreev
On the store since
Oct 2015
11 years on the store
Minimum OS
iOS 8.1+
iPhone 4s and later
Devices
iPhone · iPad
Universal purchase
Content rating
17+
1 content note below
Languages
4
EN DE EL RU
Size
53 MB
Also listed in
Books, Education
Content notesUnrestricted Web Access
KyBook 2 Ebook 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 2 Ebook 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.
In-app revenue
Worldwide, what users spend in KyBook 2 Ebook Reader before Apple and Google take their fee.
How this is calculated
Not on any Top Grossing chart: monthly active users × spend per user for its category, measured on the charted apps nearest the bottom of the charts.
Business model: Subscription-led
How KyBook 2 Ebook Reader makes money: subscriptions, one-off purchases and ads.
SubscriptionsIn-app purchases
Subscriptions
/mo
of revenue
Top in-app purchases · App Store US, most popular first
| 1 | Upgrade to Pro Version subscription | |
| 2 | Upgrade to Pro Version subscription |
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Russia | BooksFree | #77 |
Apps near KyBook 2 Ebook Reader on the chart
Books Free, around #77.
Ratings
App Store, worldwide.
Rating
4.7 ★
19k ratings
Measured
Ratings
19k
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
3.8
▲ +12% vs the 2 weeks before
Lifetime rating
4.7★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
70/100
faster than 80% 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 2 Ebook Reader
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
More:
- 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.
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
More:
- 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.
Latest updates
1.2.8
- Fixed crash when using the translation service in iOS 9.
- Few minor improvements.
