Episteme: PDF & eBook Reader

Episteme Reader is an offline-first, privacy-focused document and e-book reader. It supports PDF, EPUB, MOBI, AZW3, FB2, ODT/FODT, DOCX, Comics, Markdown, HTML, and plain text files.

📖 Two Reading Modes

Switch between a paginated view for a traditional book-like experience and continuous vertical scrolling for quick reading. Both modes work across all supported formats.

✏️ PDF Annotations

Draw directly on PDF pages using pen, fountain pen, pencil, highlighter, and eraser tools. Add text boxes anywhere on a page with system or imported fonts. Annotated documents can be exported with full vector fidelity.

🔤 Custom Fonts

Import your own font files (.ttf, .otf) and use them while reading any ebook format. Embedded book fonts and system fonts are also fully supported.

🔍 Text Selection & Search

Select, copy, and search text across all formats. Full-text search with background indexing for large documents. built-in OCR support for scanned or image-based PDFs.

🎧 Text-to-Speech

Listen to any document using your device's TTS engine or use Cloud TTS powered by Gemini for realistic voices.

🧠 Smart Tools (Pro)

Get context-aware dictionary definitions for words and phrases. Generate concise summaries of chapters or pages to quickly understand complex material.

📚 Library & Organization

Manage your collection with custom shelves and collections. Sort by title, author, or reading progress. Jump back into recent books instantly.

📂 Local Folder Sync

Point Episteme at a folder on your device to automatically import and track books.

☁️ Cloud Sync (Pro)

Sign in with Google Drive to sync your library, reading progress, bookmarks, and shelves across multiple devices. Files are stored securely in your private Google Drive app storage.

🔒 Privacy

Episteme is designed to work entirely offline. No account is needed for any core feature. AI-powered\online features process data securely in memory without storing any user content.