Episteme

Verified safeOpen sourceExclusive
5.0
1 review
17
downloads
8.0
android

AI summary

Privacy-focused document and e-book reader supporting PDF, EPUB, MOBI, AZW3, Markdown, HTML, and plain text. Features paginated and two-page spread reading, ink and text annotations, custom fonts, TTS, and library shelves with breadcrumb navigation. Open-source under AGPL-3.0. Recent updates add lasso tool for ink editing, ruby annotation support, and OPDS stream security improvements.

Generated by AI. May contain inaccuracies.

About this app

Episteme Reader is an offline-first, privacy-focused document and e-book reader that supports PDF, EPUB, MOBI, AZW3, Markdown, HTML, and plain text.

Features

Supported Formats

- Documents: PDF - E-books: EPUB, MOBI, AZW3 - Text: Markdown, TXT, HTML

PDF Features

- Viewing Modes: Vertical scroll and paginated view. - Ink Annotations: Draw directly on pages using pen, highlighter, and eraser tools. - Text Annotations: Add text notes anywhere on the page using system or custom fonts.

E-Book Features

- Parsing: Native parsing for MOBI/AZW3 via libmobi and EPUB via Jsoup. - Customization: Adjust font size, line spacing, and margins. - Custom Fonts: Support for importing user-provided font files (.ttf, .otf).

General

- Text-to-Speech (TTS): Read documents aloud using the system TTS engine. - File Management: Built-in library organization.

License

This project is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0).

What's new

v1.0.56-ossSep 24, 2026
  • EPUB & paginated reader
  • Added two-page spread support on mobile with customizable spread gaps, spine crease animations and refined page curls.
  • Added ruby annotation (furigana) support in EPUB pagination.
  • Fixed EPUB 3 series collections and prefixed OPF metadata tags.
  • Fixed MOBI chapter splitting issues inside HTML tags.
  • Enhanced author color contrast fixup for WebView rendering.
  • PDF reader & annotations
  • Added an ink selection and editing tool, lasso, with support for movement, rotation, and scaling.
  • Implemented rich text paragraph alignment (left, center, right, justify) and lists for text annotations.
  • Supported exporting single-point ink annotations as dots.
  • Optimized PDF thumbnail rendering and mapping in the pages drawer.
  • Library
  • Added breadcrumb navigation for shelves.
  • Text-to-Speech (TTS)
  • Added support for filtering favorite TTS voices.
  • Added customizable voice preview text in TTS settings.
  • OPDS
  • Improved OPDS URL handling and stream security.
  • Updated Android network security configuration.
  • Localizations
  • Updated localizations
  • Stability & fixes
  • Fixed application crashes and stability issues.

About this version

Version
1.0.56-oss (61)
Size
25.44 MB
Requires Android
8.0
Target SDK
26
Architecture
arm64-v8a, armeabi-v7a
Downloads
17
Updated
Sep 24, 2026
Package
com.aryan.reader.oss

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