Comparison

KyBook 2 Ebook Reader vs DjVu Reader & Viewer

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

DjVu Reader & Viewer

This app offers a modern and elegant way to read DjVu documents on iOS devices. It features high-quality rendering, a smart document tracking system, and a clean interface optimized for technical and academic material.

Highlights
  • High-quality DjVu rendering
  • Smart document tracking
  • Clean, intuitive interface
  • Dark/White mode options
  • Powerful search capabilities
  • Optimized performance for large documents
Features
Read full description

DjVu Reader is the modern, elegant solution for reading technical and academic DjVu documents on your iOS device. Experience crystal-clear rendering of complex documents with a clean, distraction-free interface designed for professional use. — KEY FEATURES — • High-quality rendering of DjVu documents with precise text and image display • Smart document tracking system to organize your reading (to-read, in-progress, completed) • Clean, intuitive interface optimized for academic and technical material • Dark/White modes options for comfortable reading in any environment • Powerful search capabilities to quickly find content within documents • Optimized performance for large technical documents and academic papers • Seamless document organization with smart folders and favorites (Coming Soon…) Whether you're a researcher, academic, student, or professional, DjVu Reader provides the perfect experience for your technical documents. — SUPPORT & LINKS — - Contact Us: support@djvu.app - Privacy Policy: https://djvu.app/privacy - Terms of Use: https://djvu.app/terms

Screenshots

KyBook 2 Ebook Reader4 screens
DjVu Reader & Viewer4 screens

Verdict

The call

The clearest difference is review sentiment: KyBook 2 Ebook Reader at 68% against DjVu Reader & Viewer's 25%. KyBook 2 Ebook Reader also leads on rating (4.7 vs 4.2) and update cadence (fortnightly vs every 4 months). 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 DjVu Reader & Viewer sells 2 in-app purchases, starting at $2.99 per 7 days. 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 4.2. That said, the two scores are not equally well evidenced: KyBook 2 Ebook Reader has 2.4K ratings behind it against 78, 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 25% of DjVu Reader & Viewer's.

UpkeepUpdate frequency

KyBook 2 Ebook Reader ships an update fortnightly, DjVu Reader & Viewer every 4 months. The most recent releases landed on November 13, 2026 and November 14, 2026 respectively.

Scorecard5 real differences · 5 level
KyBook 2 Ebook Reader versus DjVu Reader & Viewer: the parameters behind the verdict, then further details
ParameterKyBook 2 Ebook ReaderDjVu Reader & Viewer
PriceFreeFree
Rating4.7 (2.4K ratings) — better4.2 (78 ratings)
Positive reviews67.7% of reviews — better25.0% of reviews
Number of ratings2.4K — better78
Update frequencyFortnightly — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.1 — better16.2
Further details — not scored
Size51 MB35 MB
Age rating17+4+
DeveloperKonstantin BukreevYassir Hrout

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%

DjVu Reader & Viewer

All ratings65 ratings
Positive81.5%
Neutral0.0%
Negative18.5%
Written reviews12 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

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

DjVu Reader & Viewer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

KyBook 2 Ebook Reader

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

DjVu Reader & Viewer

Subscriptions1
  • Weekly Plan$2.997 Days
One-time1
  • Lifetime Plan$5.99

Questions

Is KyBook 2 Ebook Reader free?
KyBook 2 Ebook Reader is free to download, with in-app purchases available.
Is DjVu Reader & Viewer free?
DjVu Reader & Viewer is free to download, with in-app purchases available.
Which has better reviews, KyBook 2 Ebook Reader or DjVu Reader & Viewer?
KyBook 2 Ebook Reader is rated higher. KyBook 2 Ebook Reader averages 4.7 out of 5 from 2.4K ratings, while DjVu Reader & Viewer averages 4.2 from 78 ratings.
Do KyBook 2 Ebook Reader or DjVu Reader & Viewer have ads?
Neither KyBook 2 Ebook Reader nor DjVu Reader & Viewer shows ads.
Which is updated more often, KyBook 2 Ebook Reader or DjVu Reader & Viewer?
KyBook 2 Ebook Reader ships an update fortnightly, and DjVu Reader & Viewer every 4 months. Most recently, KyBook 2 Ebook Reader was updated on November 13, 2026 and DjVu Reader & Viewer on November 14, 2026.

Other comparisons