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CLUSTER FORMATS-READER-CUSTOMIZABLE · 27 ENTRIES · EARLIEST ENTRY 2021-03-12

Ebook reader apps

The cluster comprises 24 mobile e-book reader apps focused on importing and reading DRM-free personal files across formats like EPUB, PDF, and MOBI, with heavy emphasis on customization (fonts, themes, text size) and reading aids (bookmarks, text-to-speech, offline access). Entries before the index start are spread thinly across nearly two decades (2009-2026), with occasional small bursts (e.g., 3 in 2021-03, 2 in 2022-10), but no consistent upward trend. Traction leaders all show 0 stars, indicating no member has achieved notable activity; the highest-activity apps are Hedgehog reader, LiBook, and KRed Reader, but their signal is negligible.

Entry timeline

ENTRY TIMELINE

MAY 2014: 1MAR 2015: 1DEC 2017: 1OCT 2019: 1NOV 2019: 1MAR 2021: 3JUN 2022: 1OCT 2022: 2JUL 2023: 2AUG 2024: 1SEP 2024: 1OCT 2024: 1NOV 2024: 1JAN 2025: 1JUN 2025: 1JUL 2025: 1FEB 2026: 1MAR 2026: 1JUN 2026: 1JUL 2026: 1AUG 2026: 2SEP 2026: 1
MAY 2014SEP 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 2 hand-coded · 18 unlabelled

Operator · 1 indie · 3 commercial · 8 open source · 8 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01Hedgehog reader0★13 daysliveE-book reader app that supports numerous document formats, organizes a personal library, and offers translation, full-text search, and read-aloud features.
  2. 02KRed Reader0★22 daysliveEbook reader app supporting multiple formats including PDF, EPUB, MOBI, and comics, with distraction-free interface, text-to-speech, and wireless file import.
  3. 03EbookConverter0★1 moliveopen sourceAndroid app that converts e-books between 20+ formats on-device, with metadata editing and output profiles for e-readers.
  4. 04ReadBear0★1 moliveopen sourceMobile app for reading PDF, EPUB, and CBZ files with configurable layout, theme, language, and spacing.
  5. 05Bookshop.org: Read/Buy Ebooks0★9 dayslivecommercialEbook reading app that supports independent bookstores by donating most profits and offering a customizable reader for purchased titles.
  6. 06EPUB Reader - justread0★1 moliveiOS reading app that supports EPUB, PDF, comics, and audiobooks with extensive typography customization and read-aloud features.
  7. 07MarkDeck: PDF EPUB MD Reader0★1 moliveMobile ebook reader that displays Markdown, PDF, and EPUB files with customizable themes and clean typography.
  8. 08Shosetsu0★2 moliveopen sourceNovel reader for Android with customizable reading, extensions for content sources, and backup features.
  9. 09Chaka Book Reader0★22 daysliveopen sourceMobile ebook reader that displays PDF, EPUB, and other document formats with customizable page flipping, cropping, bookmarks, and full-text search.
  10. 10Librera Reader0★24 daysliveopen sourceE-book reader app supporting many formats like PDF, EPUB, and MOBI with customizable reading features.
  11. 11E-book Reader – reading.fm0★2 moliveMobile app that reads e-books, offering customizable fonts and themes and offline access to personal libraries.
  12. 12MapleRead SE0★13 dayslivecommercialEbook reader app that provides audio-visual reading experience with customization for book enthusiasts.
  13. 13Book's Story0★11 mostaleliveopen sourceMobile ebook reader app supporting multiple file formats with customizable themes, organized libraries, and chapter tracking for personal reading.
  14. 14Book Reader - eBook Reader Pro0★4 molivecommercialMobile ebook reader that lets readers organize a bookshelf, customize the reading display, and track streaks and progress.
  15. 15hoytoba0★unknownliveMobile application for offline reading of a publisher's book catalog, with multiple themes, fonts, adjustable text size, and bookmark folders.
  16. 16csbooks-bin0★4 molivehand-codedopen sourceA book management and reading application that reads PDF, EPUB, MOBI, and DJVU files and manages a library.
  17. 17LxReader0★11 mostaleliveopen sourceE-book reader for Android that supports multiple formats, bookmarks, font adjustments, and page-turn animations.
  18. 18YDReader-EpubAndMobiReader0★1 yrabandonedliveE-book reader app that opens TXT, EPUB, MOBI, and AZW3 files with customizable fonts, colors, spacing, and archive extraction.
  19. 19ReadTool - Offline Reader0★1 yrabandonedliveOffline file reader app that imports and displays TXT, PDF, and EPUB documents with customizable reading modes and font sizes.
  20. 20scrolly: cute pdf ebook reader0★1 yrabandonedlivehand-codedindieA PDF ebook reader that lets users adjust text size, choose themes, and save bookmarks to encourage reading.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.