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:** - **Documents:** View PDF, Markdown (MD), TXT, and HTML files. - **E-books:** Read EPUB, MOBI, and AZW3 files using native parsing. - **PDF Modes:** Vertical Scroll and Paginated views. - **Annotations:** Draw directly on pages (ink, highlighter, eraser) or add text notes. - **Customization:** Adjust font size, margins, and import custom fonts (.ttf, .otf). - **Organization:** Built-in library management and Text-to-Speech (TTS) support. This is a completely free and open-source (OSS) app built natively using Jetpack Compose.
First release: Nov 7, 2026, 1 total release.
Most recent release: Nov 7, 2026.
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Releases
- Nov 7, 2026 1.0.59-oss# What's New ### EPUB reader - Added EPUB 3 media overlay narration to "Listen". ### Read-aloud & Listen - Added transcript support for media overlay narration in the "Listen" overlay. - Narration now resumes at the last heard passage instead of restarting from the beginning.
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- Voice selections now apply audibly right away, including while playback is paused. - Listen player opening is now separate from auto-start so it no longer jumps into playback. ### Library - Added "search inside files": full-text search across your whole library, with per-file snippets and an expandable results view. - Added a sort control to unified shelves. - Implemented natural sorting for titles and file names (so "Book 2" comes before "Book 10"). ### Reader appearance - Added per-book local reader themes. ### Office documents - Added support for legacy DOC files. - Added native DOCX conversion through the office-oxide bridge. - Shared the PPTX text indexer and rendering model across platforms. ### PDF reader - Increased the maximum PDF zoom scale to 5000%. - Opaque PDF ink strokes now keep their true color instead of rendering black. - Centralized annotation export appearance and opacity so annotations look consistent on export. - Undo and redo of PDF annotations are now persisted. - The locked camera per PDF view is kept, so reopening restores it. ### Folder sync & data safety - Fixed annotation data loss caused by sidecar race conditions and empty payloads. - Folder sidecars now keep being written even when cloud sync is off. - Hardened bookmark persistence against stale snapshot overwrites. ### Localization - Removed stray zero-width spaces from Dutch, Ukrainian and Belarusian strings. ### Stability & performance - Fixed OOM allocations and added a fallback for a missing WebView. - Stopped offering the smart dictionary upsell in OSS builds. - General app stability and performance improvements.