BookFusion vs KyBook 3 Ebook Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BookFusion
Manage, read, and organize your eBooks across all devices with seamless cloud synchronization. Customize your reading experience with extensive settings, highlight notes, and text-to-speech functionality. Integrates with Calibre and supports various file formats.
- Cross-platform eBook reader and manager
- Cloud sync for reading progress and eBooks
- Customizable reading experience
- Highlighting and annotation tools
- Text-to-Speech (TTS) functionality
- Calibre integration
- Support for EPUB, PDF, CBZ/CBR
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Thousands of readers use BookFusion to manage, read and enjoy over 2 million eBooks. BookFusion is the best cross platform eBook reader and manager with cloud sync that allows you to easily read, organize and manage your eBooks across all your devices. ◇ Features ◇ Integrated Reader - Read all your EPUB, PDF, & CBZ/CBR eBooks both online and offline with clean and intuitive interface . Extensive Reader Settings - Customize your reading experience from vertical/horizontal margins, line spacing, fonts, bold/italics, colors and much more. Seamless Syncing - Sync your reading progress, highlights & annotations, eBooks and bookmarks across all devices. Pick up exactly where you left off. Organize & Manage - Easily organize and access all your eBooks seamlessly whether offline or online. Organize your eBooks using virtual bookshelves or place them into Series. Quickly find the eBook you are looking for using the category, tags or author filters. The perfect eBook Organizer & eBook Manager in one. Light & Dark Mode – Dark or Light the preference is yours! Highlights & Annotations - Highlight with your preferred colors and add tags to highlights to keep them organized. Sort your highlights by date or reading progress and easily export them to use in other apps in CSV, Markdown, HTML and PDF formats eBook Cloud - Keep your entire eBook collection at the tips of your fingers by storing them in the cloud and downloading them to read offline only when you need to. Any title just a click away. Text-to-Speech (TTS) - Listen to your favorite eBooks with Apple's native natural-sounding text-to-speech feature. Customize reading speed, voice and accessibility. Ideal for audiobook lovers busy lifestyles and accessible for all readers. Send to Kindle – Organize and quickly send your next read to your Kindle device with one click. Calibre Integration - The perfect Calibre Ally. Sync metadata, custom columns, series, tags and incremental updated PDF & EPUB files to all your devices. Your entire Calibre library on your devices when you need it. Vertical Writing Support - Read Chinese, Vietnamese, Korean, and Japanese eBooks with ease. Image/Area Highlights & Annotations (PDFs) - Easily annotate/highlight images, tables, graphs or even text. Any element at all in your PDF can now be highlighted and annotated. EPUB 3 Support - With support for the full EPUB 3 spec. You can read eBooks with rich interactivity support that includes video, audio, Q&A, games and much more. Widgets – Quickly view and jump back into your last read, currently reading, or highlights right from your home screen with iOS Widgets. Multi-Window Support (iPadOS & macOS) – Open multiple books side by side, drag books into Split View, or read and view highlights simultaneously. Perfect for multitasking, studying, or comparing texts. NOTE: You will need to install the BookFusion Calibre Plugin to sync your eBooks to all your devices. See the tutorial at https://support.bookfusion.com/hc/en-us/articles/360018852052-Installing-Using-the-BookFusion-Plugin-for-Calibre Open With - Don’t like the integrated reader? Use the open with functionality to send and read your eBooks with your preferred app. No lock-in Metadata & Book Details – Know what an eBook is about at a glance or easily edit the cover, description, author tags and other information. Additional Formats Supported via Web - These include: AZW, AZW3, AZW4, CBC, CHM, DJVU, DOCX, FB2, FBZ, HTML, HTMLZ, LIT, LRF, PRC, PDB, PML, RB, RTF, SNB, TCR, TXT, TXTZ in a single app. These must be uploaded via the Web App before using the iOS App Choose from over 70,000 eBooks ◇ Other ◇ Have feedback or just want to chat? We would love to hear from you. Drop us a line at support@bookfusion.com or join us for a chat on Discord at https://www.discord.gg/7v34UYq Terms of Service - https://www.bookfusion.com/terms Privacy Policy - https://www.bookfusion.com/privacy
KyBook 3 Ebook Reader
This app is a versatile e-book reader and cataloger supporting numerous formats like EPUB, MOBI, and PDF. It offers a comfortable reading experience with customizable options, powerful annotation tools, and seamless cloud storage integration. Organize your library with tags, collections, and a handy cataloguer.
- Supports all major e-book formats
- OPDS catalog access
- Comfortable reading mode with themes
- Powerful annotations and summary editor
- Handy cataloguer with tagging
- Cloud storage integration
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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 ebooks. • Search for books in the library and anywhere in the Internet. • Own folders tree and flexible bookshelf settings for layout and sorting. • Arranging books on a bookshelf by dragging. Working with a metadata and a table of contents • Automated extraction of a metadata from ebooks. • Convenient editing of a metadata. • Editing and creation (automatic or manual) of a table of contents. File Storage • Locally on the device. • In the Cloud Storage (iCloud Drive, Google Drive, OneDrive, Dropbox, Yandex Disk). • In the Local network on Shared Folders (SMB/CIFS) or on WebDAV server • Transparent caching of books in the Internet or Local network. • Supports of streaming audio books in Cloud Storage. • Content Server for accessing files on the device via a WiFi. Synchronization (requires subscription) • Syncs all ebooks metadata and files. KyBook offers the following subscriptions options: • 3 months: 4.49 USD • 1 year: 14.99 USD Prices may vary in other countries respecting your local currency exchange rate. Your subscription will be charged to your iTunes account. At the end of the term, unless auto-renewables subscriptions are disabled, your subscription will automatically renew in your iTunes account. You will be charged for the regular price of your subscription within 24 hours prior to the end of the current term. You can turn off automatic renewal in your iTunes account settings at any time, but you must do so at least 24 hours before the end of the current term. Refunds will not be provided for the unused portion of any term. Terms & Privacy policy http://kybook-reader.com/terms http://kybook-reader.com/privacy-policy
Screenshots
Verdict
BookFusion and KyBook 3 Ebook Reader both sit at 4.7 stars, but that hides the real split: 76% of BookFusion's written reviews are positive against 61% of KyBook 3 Ebook Reader's. KyBook 3 Ebook Reader's advantage is ratings volume (4.7K vs 523) and iOS requirement (11.0 vs 15.1). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. BookFusion sells 6 in-app purchases, starting at $1.99 per month and KyBook 3 Ebook Reader sells 4 in-app purchases, starting at $4.49 per 3 months. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for BookFusion against 4.7 for KyBook 3 Ebook Reader. That said, the two scores are not equally well evidenced: KyBook 3 Ebook Reader has 4.7K ratings behind it against 523, so its average is the more settled of the two. Written reviews are what separate them: 76% of BookFusion's written reviews are positive against 61% of KyBook 3 Ebook Reader's.
BookFusion ships an update every 10 days, KyBook 3 Ebook Reader every 5 days. Both last shipped on November 2, 2026.
| Parameter | BookFusion | KyBook 3 Ebook Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (523 ratings) — better | 4.7 (4.7K ratings) |
| Positive reviews | 76.4% of reviews — better | 61.0% of reviews |
| Number of ratings | 523 | 4.7K — better |
| Update frequency | Every 10 days | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 158 MB | 53 MB |
| Age rating | 12+ | 17+ |
| Developer | BookFusion | Konstantin Bukreev |
Customer experience
BookFusion
KyBook 3 Ebook Reader
User reviews
BookFusion
From 523 App Store ratingsWhat we love
- 🚀 Excellent cross-platform sync
- 👍 Highly customizable reading experience
- 🚀 Seamless Calibre integration
- 👍 Responsive and helpful developers
- 🚀 Smooth reading experience
Room to improve
- 🐛 Occasional bugs and crashes
- 💰 Subscription model may be costly for some
- 🔒 Requires account creation to use
- 🐛 Inconsistent page turn behavior
- 🐛 Issues with PDF and fixed-layout EPUB support
KyBook 3 Ebook Reader
From 4.7K App Store ratingsWhat we love
- 🚀 Excellent design, close to no ads
- 🚀 Handles various file formats well
- 👍 Customizable, lots of features
- 👍 Stable and fast
- 👍 Good for reading comics/manga
Room to improve
- 🐛 Sync and account issues
- 🐛 Crashes, bugs, and compatibility problems
- 🔍 Confusing interface, hard to use
- 💰 Paid features and subscription model
- 🔍 Missing key features like page turn animation
Bugs and requests
BookFusion
Reported bugs
5 issues- Highlights and notes not always saving properly
- Reading position sometimes resets unexpectedly
- Widget not functioning as expected
- Occasional crashes and freezes
- Issues with importing certain ebook formats
Requested features
6 requests- Add page numbers instead of just percentages
- Implement a true dark mode
- Improve PDF viewing and annotation capabilities
- Add support for DJVU format
- Provide an option to purchase a lifetime license
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- Implement better organization tools like folders/shelves
KyBook 3 Ebook Reader
Reported bugs
5 issues- Inability to open/read certain file formats
- Sync and account creation issues
- Problems with PDF and image display
- Crashes and compatibility problems
- Duplication of books in library
Requested features
6 requests- Left alignment option
- Dark mode/OLED black theme
- Improved image handling
- Better support for Chinese language
- Vertical page flip
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- Improved text-to-speech capabilities
In-app purchases
BookFusion
- Casual Monthly$1.991 Month
- Advanced Monthly$4.991 Month
- Power Monthly$9.991 Month
Show 3 moreShow fewer
- Casual Yearly$18.991 Year
- Advanced Yearly$47.991 Year
- Power Yearly$95.991 Year
KyBook 3 Ebook Reader
- 3 months subscription7 Days trial$4.493 Months
- Yearly subscription7 Days trial$14.991 Year
- Upgrade to Pro (Discount)$2.99
- Upgrade to Pro$4.99
Questions
Is BookFusion free?
Is KyBook 3 Ebook Reader free?
Which has better reviews, BookFusion or KyBook 3 Ebook Reader?
Do BookFusion or KyBook 3 Ebook Reader have ads?
Which is updated more often, BookFusion or KyBook 3 Ebook Reader?
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