Episteme: PDF & eBook Reader

Episteme Dev

In-app purchases

About this app

Episteme Reader is an offline-first, privacy-focused document and e-book reader. It supports PDF, EPUB, MOBI, AZW3, FB2, 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, .woff2) 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.

🧠 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.

Ratings and reviews

Very, very promising! I've been using separate "simple" readers for pdfs and epubs because I don't want the granular metadata editing stuff and this strikes a good balance between simplicity and just enough features without all the bloat. Can you add an option to adjust the margins in the future? Literally that's the one thing that's missing for me!

It's great e-book reader but I have an issue with reading some books in pdf format. The problem is the fact of reading it from tiny phone screen which is uncomfortable, so (it's necessary to zoom in, but it should be done for every single page manually, instead of universal and one time functionality) It would be great if lock symbol would (lock the position of the page with current zoom and it could be possible to turn pages, effectively reading as usual). I hope you will pay attention!

Thank you for this app! I'm really impressed because it works better than Play Books (that I used to use daily). The only missing feature for me is toggling the light/dark mode while reading. It's really hard to read in a full sun with dark mode on pages. Thanks again!

What’s new

• Added page textures with transparency control
• Added vertical margin control for the reader
• Improved PDF jump list navigation
• Added better toolbar customization and organization
• Performance optimizations for home and library screens
• Other crash and bug fixes