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
- 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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