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, 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.

Ratings and reviews

The app is head and shoulders above its competitors, it's excellent. It's also worth mentioning the integration of AI features and the flexible interface customization... but there are a couple of downsides. First, the words aren't highlighted correctly, either the wrong part or a completely blank character. Some books don't have covers, and I wish I could add them myself.

The absolute best app!!! I spent days looking for an app that let's me read pdfs without any extra fuss, but still with at least minimal editing option like highlighting. And this is it! It's simple looking, simple to use, works well, no pop-ups in your face, no extra bulk with features that I wouldn't ever want to use anyway, perfect for reading and highlighting which I think are the two essential things a mobile reader app needs to do.

It's really an all rounder app. Excellent approach by developers. But can you please add a feature where we can add words we use dictionary for in a list so we can review them later? Also it doesn't support bengali language in bengali books

What’s new

• Optional, redesigned, unified library for a simpler, more consistent experience
• Added newest and oldest sorting options
• Improved chapter handling for EPUB and Markdown books
• Improved touchpad scrolling and reading controls
• Fixed reading progress, text selection, TTS, and layout issues
• Improved stability and fixed crashes