PocketBook Reader vs KyBook 3 Ebook Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PocketBook Reader
This app is a versatile reader supporting 26 book and audio formats, including EPUB, PDF, and audiobooks. It offers features like PDF reflow, text-to-speech, cloud synchronization, and extensive customization options for a comfortable reading experience.
- Supports 26 book and audio formats
- PDF Reflow function
- Text-to-speech engine
- Cloud synchronization service
- Customizable interface and reading settings
- Adobe DRM support
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PocketBook Reader is a free app for reading all formats (books, magazines, textbooks, comic books, etc.) and listening to audiobooks! The application supports 26 book and audio formats, including mobi, epub, fb2, cbz, cbr. Read without ads and with total comfort! Choose any content - any format! • Support of 19 book formats, including the most popular - EPUB, FB2, MOBI, PDF, DJVU, DOCX, RTF, TXT, HTML; • Comic book formats CBR and CBZ; • Open books protected with Adobe DRM (PDF, EPUB); • PDF Reflow function (reflow text in PDF files). Listen to audiobooks! • You can listen to audiobooks and other audio files in MP3, M4B, and take notes in them; • Built-in TTS (Text-to-speech) engine for the voicing of the text files. Download and sync content easily! • Free PocketBook Cloud service for synchronizing all your books, including audiobooks, as well as reading positions, notes and bookmarks on all your devices; • Your files from Dropbox or Google Books services are easily connected to the app to create one consolidated library. You can even connect multiple accounts at the same time; • Support for OPDS catalogs - get access to network libraries; • ISBN scanner, for quick search of electronic versions of books by barcode; • Opportunity to borrow books and periodicals; • If you have a E Ink e-reader PocketBook, you can easily synchronize all your books and accounts just by scanning a QR code. Ready to switch from another app? No problem! Getting started with PocketBook Reader is easy! With an intuitive interface, the application provides you with unprecedented freedom – lots of options for settings and no restrictions. Choose, change, customize, and personalize! • Intuitive interface, easy navigation, and minimalistic design; • Opportunity to choose one of the seven interface color themes, reassign the buttons and display areas; • Two night-reading modes - for better reading comfort anytime; • Adjust the font style, font size, line spacing, and margin size; • Animation of turning pages; • Opportunity to crop margins – make the page look exactly the way you want. Get fast file access and easy search! • All files are quickly found and instantly opened, even with built-in audio and video fragments; • Your books will never be lost in the device’s memory - thanks to the smart search, scanning files on your tablet or smartphone is a matter of seconds. Any file or document can be found in a few clicks! • The app allows you to sort books, create collections, filter and mark files as you like. Your library - your rules; • Convenient managing of audio files - it is easy to sort and play your audiobooks. Make bookmarks, take notes, add comments! • You can quickly find all your notes and share them with friends via email or messengers; • Collect all your notes, bookmarks, and comments into separate files for even greater convenience. PocketBook Reader was created by avid readers for avid readers, and that’s why it’s probably the best e-book reader app.
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
The clearest difference is update cadence: KyBook 3 Ebook Reader at every 5 days against PocketBook Reader's every 2 months. KyBook 3 Ebook Reader also leads on rating (4.7 vs 4.5) and iOS requirement (11.0 vs 13.0). PocketBook Reader's advantage is chart position (#169 vs unranked). On price, review sentiment, ratings volume 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. PocketBook Reader sells 41 one-off in-app purchases 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.
KyBook 3 Ebook Reader holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 9.8K and 4.6K respectively. Written reviews point the same way: 54% of PocketBook Reader's written reviews are positive against 61% of KyBook 3 Ebook Reader's.
PocketBook Reader ships an update every 2 months, KyBook 3 Ebook Reader every 5 days. The most recent releases landed on September 27, 2026 and September 26, 2026 respectively.
| Parameter | PocketBook Reader | KyBook 3 Ebook Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (9.8K ratings) | 4.7 (4.6K ratings) — better |
| Positive reviews | 54.5% of reviews | 60.6% of reviews — better |
| Number of ratings | 9.8K — better | 4.6K |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #169 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 106 MB | 53 MB |
| Age rating | 9+ | 17+ |
| Developer | Pocketbook International SA | Konstantin Bukreev |
Customer experience
PocketBook Reader
KyBook 3 Ebook Reader
User reviews
PocketBook Reader
From 9.8K App Store ratingsWhat we love
- 👍 Convenient reading experience
- 🚀 Smooth scrolling
- 💡 Customizable settings (font, margin, etc.)
- 🔒 Supports DRM-protected content
- 👍 Intuitive user interface
Room to improve
- 🐛 Crashes and freezes
- 🐛 Unreliable cloud sync
- 🐛 Inconsistent page rendering
- 🐛 Buggy text highlighting and annotation
- 🐛 Slow loading times
KyBook 3 Ebook Reader
From 4.6K 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
PocketBook Reader
Reported bugs
4 issues- Books disappearing from library after login issues
- Inability to open DRM-protected PDFs
- Inconsistent behavior when switching between portrait and landscape modes
- Text-to-speech voice quality issues
Requested features
5 requests- Ability to organize books into custom folders
- Option to disable quick action zones
- Improved text-to-speech controls (seek, pause, etc.)
- Support for handwritten annotations with Apple Pencil
- Faster page turning and scrolling
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
PocketBook Reader
- eBook3 variants$0.99
- eBook (class A)$0.99
- eBook2 variants$1.99
Show 38 moreShow fewer
- eBook (class B)$1.99
- eBook$2.95
- eBook2 variants$2.99
- eBook (class C)$2.99
- eBook3 variants$3.99
- eBook: type 4.79$3.99
- eBook: type 4.19$3.99
- eBook (class D)$3.99
- eBook (class Alt5)$4.99
- eBook: type 5.39$4.99
- eBook (class F)$4.99
- eBook: type 5.89$4.99
- eBook$4.99
- eBook: type 5.09$4.99
- eBook (class G)$5.99
- eBook2 variants$5.99
- eBook: type 7.09$5.99
- eBook: type 7.19$5.99
- eBook: type 8.29$6.99
- eBook: type 7.59$6.99
- eBook3 variants$7.99
- eBook: type 8.89$7.99
- eBook (class J)$8.99
- eBook$8.99
- eBook$9.90
- eBook2 variants$9.99
- eBook (class L)$10.99
- eBook: type 13.9$11.90
- eBook$11.99
- eBook: type 12.99$11.99
- eBook$12.99
- eBook (class N)$12.99
- eBook (class O)$13.99
- eBook: type 17.9$14.90
- eBook$14.99
- eBook (class R)$16.99
- eBook (class T)$18.99
- eBook (class W)$21.99
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 PocketBook Reader free?
Is KyBook 3 Ebook Reader free?
Which has better reviews, PocketBook Reader or KyBook 3 Ebook Reader?
Do PocketBook Reader or KyBook 3 Ebook Reader have ads?
Which is updated more often, PocketBook Reader or KyBook 3 Ebook Reader?
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