Comparison

KyBook 2 Ebook Reader vs FBReader

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

FBReader

A fast and versatile e-book reader supporting multiple formats like ePub, Kindle, and fb2. It offers cloud syncing for reading progress and a customizable interface. Upgrade to unlock unlimited library access and advanced features.

Highlights
  • Supports ePub, Kindle azw3, fb2, RTF, Word, HTML, and text
  • ePub3 and Readium LCP DRM support
  • Cloud syncing of library and reading positions
  • Customizable appearance and behavior options
  • Direct opening of downloaded files
  • Free version with library limits
Features
Read full description

FBReader is a fast and easy-to-use e-book reader for iPhone and iPad. It supports all major e-book formats, including ePub (with key ePub3 features), Kindle azw3, and fb2 (.zip). You can open both unprotected books and ePub files protected with Readium LCP DRM. FBReader also reads RTF, Word (.doc), HTML, and plain text, so you can keep all your books and documents in one place. Read anywhere and pick up right where you left off. FBReader can sync your library, reading positions, bookmarks, and more across devices using the FBReader Book Network, a cloud service powered by Google Drive. If you prefer managing files yourself, you can download books in your browser and open them directly with FBReader. A wide range of appearance and behavior options lets you customize the reading experience to match your preferences. Free version and upgrade options: • The free version allows up to 10 books in your library. • The built-in translation feature is disabled. Upgrade to the full version to remove these limits and enjoy the complete FBReader experience.

Screenshots

KyBook 2 Ebook Reader4 screens
FBReader4 screens

Verdict

The call

The clearest difference is rating: KyBook 2 Ebook Reader at 4.7 against FBReader's 3.7. KyBook 2 Ebook Reader also leads on ratings volume (2.3K vs 128) and review sentiment (68% vs 52%). On price, ads, in-app purchases and monetization model 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 FBReader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

KyBook 2 Ebook Reader holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: KyBook 2 Ebook Reader has 2.3K ratings behind it against 128, so its average is the more settled of the two. Written reviews point the same way: 68% of KyBook 2 Ebook Reader's written reviews are positive against 52% of FBReader's.

UpkeepUpdate frequency

KyBook 2 Ebook Reader ships an update fortnightly, FBReader monthly. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 5 level
KyBook 2 Ebook Reader versus FBReader: the parameters behind the verdict, then further details
ParameterKyBook 2 Ebook ReaderFBReader
PriceFreeFree
Rating4.7 (2.3K ratings) — better3.7 (128 ratings)
Positive reviews67.6% of reviews — better52.5% of reviews
Number of ratings2.3K — better128
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS8.1 — better13.0
Further details — not scored
Size51 MB22 MB
Age rating17+17+
DeveloperKonstantin BukreevFBReader.ORG Limited

Customer experience

KyBook 2 Ebook Reader

All ratings2,337 ratings
Positive93.7%
Neutral2.5%
Negative3.8%
Written reviews250 reviews
Positive67.6%
Neutral6.0%
Negative26.4%

FBReader

All ratings128 ratings
Positive64.8%
Neutral9.4%
Negative25.8%
Written reviews322 reviews
Positive52.5%
Neutral14.0%
Negative33.5%

User reviews

KyBook 2 Ebook Reader

From 2.3K 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

FBReader

From 128 App Store ratings

What we love

  • 🚀 Fast and smooth reading experience
  • 👍 Simple and intuitive interface
  • 💡 Customizable font, margin, and layout options
  • 🔒 Secure syncing across devices
  • 🎨 Retro background textures

Room to improve

  • 🐛 Occasional crashes and freezes
  • 🔧 Lack of advanced organization features (folders, shelves)
  • 🚫 No PDF support
  • 🔍 Inconsistent search and book discovery
  • 🔒 Privacy concerns around data collection

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

FBReader

Reported bugs

4 issues
  • Syncing issues with Google Drive
  • Deletion of books from library
  • Formatting problems with large footnotes
  • Compatibility issues with newer iOS versions

Requested features

5 requests
  • Vertical scrolling mode
  • Improved bookmark and annotation tools
  • Ability to add/change book covers
  • Text-to-speech functionality
  • Better library management (read/unread, collections)

In-app purchases

2 purchases

KyBook 2 Ebook Reader

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

FBReader

One-time1
  • FBReader Full Edition2 variants$12.99

Questions

Is KyBook 2 Ebook Reader free?
KyBook 2 Ebook Reader is free to download, with in-app purchases available.
Is FBReader free?
FBReader is free to download, with in-app purchases available.
Which has better reviews, KyBook 2 Ebook Reader or FBReader?
KyBook 2 Ebook Reader is rated higher. KyBook 2 Ebook Reader averages 4.7 out of 5 from 2.3K ratings, while FBReader averages 3.7 from 128 ratings.
Do KyBook 2 Ebook Reader or FBReader have ads?
Neither KyBook 2 Ebook Reader nor FBReader shows ads.
Which is updated more often, KyBook 2 Ebook Reader or FBReader?
KyBook 2 Ebook Reader ships an update fortnightly, and FBReader monthly. Most recently, KyBook 2 Ebook Reader was updated on September 26, 2026 and FBReader on September 25, 2026.

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