Comparison

KyBook 2 Ebook Reader vs BookFusion

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KyBook 2 Ebook Reader

This app is a versatile e-book reader that supports a wide range of formats including EPUB, MOBI, and PDF. It offers extensive customization for reading modes, cloud storage integration, and text-to-speech capabilities for audiobooks.

Highlights
  • Supports EPUB, MOBI, PDF, DJVU, and more
  • OPDS catalog and cloud storage integration
  • Customizable reading modes (font, theme, size)
  • Text-to-speech for e-books and audiobooks
  • Book cataloging and organization
  • Speed reading and text summarization
Features
Read full description

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.

About

BookFusion

Manage, read, and organize your entire eBook collection across all devices with cloud synchronization. Customize your reading experience with extensive settings, highlights, and annotations. Supports various formats and offers text-to-speech functionality.

Highlights
  • Cross-platform eBook reader
  • Cloud synchronization
  • Organize with virtual bookshelves
  • Highlights and annotations
  • Text-to-Speech (TTS)
  • Send to Kindle
  • Calibre integration
Features
Read full description

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

Screenshots

KyBook 2 Ebook Reader4 screens
BookFusion4 screens

Verdict

The call

KyBook 2 Ebook Reader and BookFusion both sit at 4.7 stars, but that hides the real split: 76% of BookFusion's written reviews are positive against 68% of KyBook 2 Ebook Reader's. KyBook 2 Ebook Reader's advantage is ratings volume (2.4K vs 521) and iOS requirement (8.1 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KyBook 2 Ebook Reader sells 2 one-off in-app purchases and BookFusion sells 6 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for KyBook 2 Ebook Reader against 4.7 for BookFusion. Both are backed by a comparable volume of ratings — 2.4K and 521 respectively. Written reviews are what separate them: 68% of KyBook 2 Ebook Reader's written reviews are positive against 76% of BookFusion's.

UpkeepUpdate frequency

KyBook 2 Ebook Reader ships an update fortnightly, BookFusion every 10 days. Both last shipped on October 26, 2026.

Scorecard3 real differences · 7 level
KyBook 2 Ebook Reader versus BookFusion: the parameters behind the verdict, then further details
ParameterKyBook 2 Ebook ReaderBookFusion
PriceFreeFree
Rating4.7 (2.4K ratings) — better4.7 (521 ratings)
Positive reviews67.7% of reviews76.4% of reviews — better
Number of ratings2.4K — better521
Update frequencyFortnightlyEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.1 — better15.1
Further details — not scored
Size51 MB158 MB
Age rating17+12+
DeveloperKonstantin BukreevBookFusion

Customer experience

KyBook 2 Ebook Reader

All ratings2,337 ratings
Positive93.7%
Neutral2.5%
Negative3.8%
Written reviews251 reviews
Positive67.7%
Neutral6.0%
Negative26.3%

BookFusion

All ratings519 ratings
Positive92.7%
Neutral2.5%
Negative4.8%
Written reviews225 reviews
Positive76.4%
Neutral9.3%
Negative14.2%

User reviews

KyBook 2 Ebook Reader

From 2.4K App Store ratings

What we love

  • 👍 Stable and solid
  • 👍 Customizable reading experience
  • 👍 Excellent reading app
  • 👍 Great for reading PDFs and ebooks
  • 👍 Syncs across devices

Room to improve

  • 🐛 Bugs and crashes
  • 💰 Aggressive push for paid upgrades
  • 🔍 Confusing navigation and UI
  • 📢 Intrusive ads
  • 🔒 Clipboard access concerns

BookFusion

From 521 App Store ratings

What 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

Bugs and requests

KyBook 2 Ebook Reader

Reported bugs

4 issues
  • Books not loading properly
  • Restore purchases not working
  • Sync issues with cloud services
  • Unexpected behavior after updates

Requested features

6 requests
  • Ability to edit color themes
  • Organize books into folders
  • Annotation and note-taking features
  • Resume reading from last page
  • Goodreads integration
Show 1 more
  • Adjustable font size and brightness

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
Show 1 more
  • Implement better organization tools like folders/shelves

In-app purchases

2 purchases

KyBook 2 Ebook Reader

One-time2
  • Upgrade to Pro Version$1.99
  • Upgrade to Pro Version$2.99
6 purchases

BookFusion

Subscriptions6
  • Casual Monthly$1.991 Month
  • Advanced Monthly$4.991 Month
  • Power Monthly$9.991 Month
Show 3 more
  • Casual Yearly$18.991 Year
  • Advanced Yearly$47.991 Year
  • Power Yearly$95.991 Year

Questions

Is KyBook 2 Ebook Reader free?
KyBook 2 Ebook Reader is free to download, with in-app purchases available.
Is BookFusion free?
BookFusion is free to download, with in-app purchases available.
Which has better reviews, KyBook 2 Ebook Reader or BookFusion?
KyBook 2 Ebook Reader is rated higher. KyBook 2 Ebook Reader averages 4.7 out of 5 from 2.4K ratings, while BookFusion averages 4.7 from 521 ratings.
Do KyBook 2 Ebook Reader or BookFusion have ads?
Neither KyBook 2 Ebook Reader nor BookFusion shows ads.
Which is updated more often, KyBook 2 Ebook Reader or BookFusion?
KyBook 2 Ebook Reader ships an update fortnightly, and BookFusion every 10 days. Most recently, KyBook 2 Ebook Reader was updated on October 26, 2026 and BookFusion on October 26, 2026.

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