Comparison

Yomu EBook Reader vs KyBook

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

Head to head
About

Yomu EBook Reader

An independent ebook reader designed for distraction-free reading with customizable styles and layouts. Supports a wide range of formats and offers robust library management features. Cloud synchronization is available for pro users.

Highlights
  • Customizable reading styles and themes
  • Supports EPUB, MOBI, Kindle, CBZ, CBR, PDF
  • Dynamic text and margin adjustment
  • Library organization with folders and tags
  • Cloud synchronization for books and annotations (Pro)
  • Text highlighting and note-taking
  • Widgets for quick access to books and quotes
Features
Read full description

Yomu is an independent reader for book lovers. Yomu’s design is carefully crafted for ebooks and offers custom styles for better readability and distraction-free reading. Designed to let you focus on reading, Yomu has no unnecessary preferences. Just open a book and start reading. Yomu’s fluid layout dynamically adjusts all text properties and margins depending on your preferred styles and device, giving you an optimal reading experience. FORMATS Yomu supports standard ebooks without digital rights management. Supported formats: - EPub (.epub) - Mobi (.mobi, .prc) - Kindle (.azw, .azw3, .kf8) - Comics (.cbz, .cbr) - PDF (.pdf) Choose free books from publishers such as Standard Ebooks or Project Gutenberg. Download ebooks directly from your browser or copy files from other apps. Import files with iCloud Drive, iTunes File Sharing, or from Dropbox, Google Drive, OneDrive, OPDS and Calibre. READER The reader's design is carefully crafted for ebooks and offers custom styles for better readability. Choose your favorite theme font (Lato, Georgia, Lexend, OpenDyslexic, ...), reader mode (day, sepia, grey, black, ...), select a preset or custom font size, content layout (page, scroll) and many more options. All settings can be saved as your personal default for each book. Swipe or tap to go to the next page. You can also use the book's content outline or table of contents to navigate to another chapter. While reading EPub, Mobi and Kindle books, select text to take notes or highlight favorite sections. Create bookmarks or search inside ebooks to quickly find anything you are looking for. LIBRARY Organise your books in an easy to use library. Manage your library by creating folders or tags to organize your books. Sort your collection either by title, author, series, recently read or drag and drop for a custom order. You can edit a document's title, author, summary, cover or any other meta data. Save or export your books with all information and annotations in text, markdown or json format. CLOUD Yomu's Cloud Library (pro only) stores your books and annotations securely in Apple's iCloud. Keep all your ebooks safe and at hand on whatever device. Every time you change something on one device, it's synced to all your other devices. Always have the latest version, when you start reading on your iPad and continue on your iPhone on the go. Please note that you need to be signed in on your device with the same Apple ID on all platforms. WIDGETS See your recently read books or highlighted quotes. Yomu includes widgets to quickly view and open your books and quotes. Add a widget from the gallery and choose a list from the options. Tap on an entry to continue reading where you left off. YOMU PRO Yomu is free to use and includes all basic features. Every ebook format, theme or setting is available and lets you try out the unrestricted reader. However, the free version has some limitations and does not include certain features. Upgrade to Yomu Pro to get: - Cloud Library: Store and sync your library with Apple’s iCloud. - Unlimited Documents: No limit on the number of documents. - No Advertisement: Free version can display ads. Yomu is an independent app, your purchase supports the further development. When you buy an in-app purchase, you are doing so through Apple’s App Store and agree to their terms and conditions. Payments will be charged to the credit card of your Apple account. SERVICE Yomu is available for iPhone, iPad and Mac. In contrast to other apps, Yomu does not collect or sell any personal information. And it keeps your data private. Terms of Service: https://www.yomu-reader.com/terms/ Privacy Policy: https://www.yomu-reader.com/privacy/ Support: https://www.yomu-reader.com/support/

About

KyBook

This app is a versatile e-book reader supporting a wide range of formats including EPUB, PDF, and audiobooks. It offers extensive customization for reading modes, cloud storage integration, and easy book organization. Advanced features like DJVU support and speed reading are available via in-app purchase.

Highlights
  • Supports EPUB, FB2, PDF, DJVU, CBR, CBZ, MP3, M4A, M4B formats
  • OPDS catalogs and cloud storage integration
  • Customizable reading mode settings
  • Book organization and cataloging
  • Text-to-speech and dictionary support
  • Speed Reading (RSVP)
Features
Read full description

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.

Screenshots

Yomu EBook Reader4 screens
KyBook4 screens

Verdict

The call

The clearest difference is rating: Yomu EBook Reader at 4.8 against KyBook's 4.4. Yomu EBook Reader also leads on review sentiment (80% vs 71%) and ratings volume (1.6K vs 466). KyBook's advantage is iOS requirement (8.0 vs 17.0). On price, update cadence, ads and in-app purchases 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. Yomu EBook Reader sells 2 one-off in-app purchases and KyBook sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Yomu EBook Reader holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 1.6K and 466 respectively. Written reviews point the same way: 80% of Yomu EBook Reader's written reviews are positive against 71% of KyBook's.

UpkeepUpdate frequency

Yomu EBook Reader ships an update monthly, KyBook every 3 weeks. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Yomu EBook Reader versus KyBook: the parameters behind the verdict, then further details
ParameterYomu EBook ReaderKyBook
PriceFreeFree
Rating4.8 (1.6K ratings) — better4.4 (466 ratings)
Positive reviews80.3% of reviews — better71.2% of reviews
Number of ratings1.6K — better466
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.08.0 — better
Further details — not scored
Size61 MB50 MB
Age rating4+17+
DeveloperBeat RaessKonstantin Bukreev

Customer experience

Yomu EBook Reader

All ratings1,625 ratings
Positive95.4%
Neutral1.9%
Negative2.6%
Written reviews755 reviews
Positive80.3%
Neutral6.8%
Negative13.0%

KyBook

All ratings464 ratings
Positive85.3%
Neutral3.2%
Negative11.4%
Written reviews552 reviews
Positive71.2%
Neutral8.2%
Negative20.7%

User reviews

Yomu EBook Reader

From 1.6K App Store ratings

What we love

  • 🚀 Customizable reading experience
  • 📚 Supports wide range of file formats
  • 💻 Seamless sync across devices
  • 🔒 No DRM or subscription issues
  • 🗂️ Effective organization with folders and tags

Room to improve

  • 🐛 Occasional bugs with highlighting and page turning
  • 🔍 Limited search functionality
  • 📚 Lack of nested folders for better organization
  • 🔧 Some customization options could be improved
  • 🖼️ Thumbnails/cover art could be larger

KyBook

From 466 App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Fast and smooth performance
  • 📚 Supports wide range of file formats
  • 🔖 Good organization and categorization features
  • 🔊 Excellent text-to-speech functionality

Room to improve

  • 🐛 Syncing issues, especially with Dropbox and Google Drive
  • 🔍 Navigation and file management could be improved
  • 💰 Paid version required for some key features
  • 📢 Intrusive ads in free version
  • 🔧 Lack of updates and support from developers

Bugs and requests

Yomu EBook Reader

Reported bugs

4 issues
  • Occasional crashes or freezes
  • Inconsistent behavior when swiping to turn pages
  • Syncing issues between devices
  • Formatting problems with certain ebook files

Requested features

6 requests
  • Add support for text-to-speech
  • Improve PDF handling with annotation and text selection
  • Implement nested folder structure for better organization
  • Expand font and theme customization options
  • Introduce a continuous scrolling mode
Show 1 more
  • Add a more prominent 'return to last read position' feature

KyBook

Reported bugs

4 issues
  • Crashes after recent iOS updates
  • Text-to-speech function not working properly on newer devices
  • Inability to delete books from the app
  • Inconsistent theme and color customization behavior

Requested features

5 requests
  • Add support for more languages
  • Improve image handling and layout
  • Implement better annotation and highlighting tools
  • Provide easier access to main library from subfolders
  • Add ability to password protect individual books or folders

In-app purchases

2 purchases

Yomu EBook Reader

One-time2
  • Yomu Pro$7.99
  • Yomu Pro (Karma)$12.99
2 purchases

KyBook

One-time2
  • Upgrade to Pro Version$0.99
  • Upgrade to Pro Version$1.99

Questions

Is Yomu EBook Reader free?
Yomu EBook Reader is free to download, with in-app purchases available.
Is KyBook free?
KyBook is free to download, with in-app purchases available.
Which has better reviews, Yomu EBook Reader or KyBook?
Yomu EBook Reader is rated higher. Yomu EBook Reader averages 4.8 out of 5 from 1.6K ratings, while KyBook averages 4.4 from 466 ratings.
Do Yomu EBook Reader or KyBook have ads?
Neither Yomu EBook Reader nor KyBook shows ads.
Which is updated more often, Yomu EBook Reader or KyBook?
Yomu EBook Reader ships an update monthly, and KyBook every 3 weeks. Most recently, Yomu EBook Reader was updated on October 24, 2026 and KyBook on October 24, 2026.

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