KyBook 3 Ebook Reader
KyBook 3 Ebook Reader Summary
KyBook 3 Ebook Reader is a with in-app purchases iOS app in Books And Reference by Konstantin Bukreev. Released in Sep 2018 (7 years ago). It has 18.6K ratings with a 4.69★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 69.3K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Feb 23, 2019, version 165.
Recent activity: 6.00 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Apr 26, 2026.
Store info: Last updated on App Store on Feb 23, 2019 (version 165).
4.69★
Ratings: 18.6K
Screenshots
App Description
KyBook is the application for reading and cataloging e-books in a modern, user-friendly style.
KyBook supports all the major e-book formats, OPDS catalogs and Cloud Storage.
Key features
• All the major e-book formats
• OPDS catalogs
• Comfortable reading mode
• Powerful annotations
• Handy cataloguer
• Cloud Storage
Ebook Formats
• EPub (DRM-free)
• PDF (DRM-free)
• MobiPocket and Kindle (mobi, azw3)
• DjVu
• FictionBook (fb2, fb2.zip)
• Comic Book (cbr, cbz, cbt)
• Audio Book (mp3, m4a, m4b)
• Plain and rich text (txt, rtf)
OPDS Catalogs
• Provides access to enormous collection of free electronic books through OPDS-catalogs support.
• Built-in list of well-known OPDS Catalogs
• Allows add own catalog (e.g. Calibre content server)
• Supports for .onion OPDS Catalogs reachable via Tor Network
Comfortable reading mode
• Themes, color schemes for reading (day, night, sepia and more).
• Page turn with scroll, curl and slide.
• Designed to be fast, energy efficient, optimized for very large books (books in millions of words)
• Auto scrolling mode
• Text-to-speech technology to voice any e-book
EPUB/FB2/MOBI specific features
• Customizable font, text size, page margins, paragraph indentation, background and more
• Typography aware (hanging punctuation, hyphenations and more)
PDF/DJVU specific features
• Crops a page margins in manual and automatic mode
• Smart zooming by double-tap
• PDF Reflow on iPhone
• Page text recognition (OCR)
Powerful annotations
• Marked text and bookmarks
• Drawn annotations in any ebook (Apple Pencil support and just by touching).
• Annotations exports in Markdown, HTML, PDF, RTF formats.
Built-in the summary editor
• Markdown formatting.
• Exports summaries in Markdown, HTML, PDF, RTF formats.
Working with fragments of text
• Translation of separate words or complete sentences in different languages.
• Search for a word definition in dictionaries.
• Custom dictionaries in Dictd, StarDict and Lingvo DSL format
• Full text searching in a book (textual, fuzzy and search using regular expressions).
• Built-in search for a selected text on the Internet or Wikipedia.
Handy cataloguer
• Grouping by categories: by authors, subjects, sequences, publishers, tags, popular, recent, new, unread, reading and finished.
• Tags and collections to categorize