KyBook - EPub,FB2,PDF,DjVu Reader
Research answer
What AppTrendKit can say about KyBook - EPub,FB2,PDF,DjVu Reader today
KyBook - EPub,FB2,PDF,DjVu Reader has no estimate-backed download or gross-consumer-spend figure that meets the public evidence contract yet.
Observed App Store metadata, chart positions, and history are shown below. Missing, non-finite, undefined-currency, or undefined-metric evidence stays missing rather than becoming zero.
Performance intelligence
Observed trajectory and estimates
Store ranks are observations. Downloads and gross store consumer spend are AppTrendKit estimates and only appear when persisted evidence exists.
Estimated downloads · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated downloads · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Evidence history
Collected daily performance
No daily metric history has been persisted yet.
Rank history
Observed chart positions
Lower rank is better. Only collected observations are shown.
Coverage note
What the ranks mean
A missing rank is not treated as zero downloads or zero revenue. Apple chart feeds are bounded and may return censored or not-ranked observations outside the visible chart depth.
Read the methodStorefront mix
Top countries by estimated contribution
Country estimates are aggregated only after country-level predictions exist.
Monetization
Observed store economics signals
These are listing and product observations. They are not company revenue, subscriber counts, or advertising revenue.
App details
Store metadata
- Version
- 2.1.6
- Released
- Aug 9, 2013
- Last updated
- Jun 3, 2016
- Content rating
- 17+
- Default storefront
- PL
Public IAP observations
Validated in-app purchase prices
Only persisted rows with an explicit public publication boundary are shown. Missing price, currency, country, or date values stay unknown.
Listing detail
What the store says
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.
Publisher websiteStore creative
Screenshots
Competitive set
Similar apps
Deterministic links to real stored apps matched by category, publisher, and comparable performance bands.
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READ ASAP LTD
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LTD DevelSoftware
Methodology and provenance
Read every number with its evidence
Metadata source: Apple iTunes Search API; observed Sep 7, 2026, 11:15 PM.
Rankings: collected chart positions from the listed storefront. Missing ranks are not zeros.
Economics: downloads and gross store consumer spend are estimated, not official Apple or publisher figures.
Model: No persisted model version.
Confidence: —; intervals widen when evidence or history is limited.
Last observation: Sep 7, 2026, 11:15 PM.
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Open methodology