# Episteme

Read documents and e-books offline

Canonical: https://softwareontheweb.com/product/episteme
Website: https://github.com/Aryan-Raj3112/episteme
Categories: Productivity, Free, Open-Source, Android, In-App Purchases, Windows, Note Taking, Researchers, Students, Knowledge Workers, Bookmarks & Reading List, Research Assistance, Markup & annotation
Updated: 2026-06-08T04:00:07+00:00

### What is Episteme Reader?

Episteme Reader is a clean, privacy-focused app for reading digital books and documents on your phone or tablet. It works completely offline, contains zero ads, and gives you a smooth reading experience without any unnecessary clutter.

### Which file formats can I open?

You no longer need separate apps for different files. This app opens almost any reading format you have, including:

- E-books: EPUB, MOBI, AZW3, and FB2.
- Documents: PDF, DOCX, ODT, and FODT.
- Plain Text & Code: Markdown (MD), HTML, and TXT files.
- Entertainment: Comic book archives.

### How can I customize the look of my books?

You can adjust the display text to make reading comfortable for your eyes:

- Change the font sizes, line spacing, and paragraph gaps.
- Control the brightness directly inside your document.
- Import your own custom text styles using .ttf or .otf font files.

### What are the available reading modes?

The app features two layout styles to fit your personal preference:

- Paginated View: Turns pages sideways, just like a traditional physical book.
- Continuous Vertical Scroll: Lets you glide straight down through pages for quick scanning.
- Two-Page Spread: View two pages side-by-side when using larger tablet screens.

### Can I write notes and draw on my PDFs?

Yes. The app includes built-in sketch and typing tools specifically for your PDF documents:

- Draw or sketch directly on the page using a digital pen, fountain pen, or pencil.
- Highlight important sentences and erase mistakes instantly.
- Type out text notes anywhere on the screen.
- Export your edited PDFs with crisp, high-quality vector details.

### Does it have a Text-to-Speech feature?

Yes. If your hands are busy or your eyes are tired, you can listen to your documents out loud:

- Listen using your standard built-in system voice engine.
- Connect to advanced cloud voices for a highly natural, human-sounding narration.
- Control your audio easily using simple playback shortcuts.

### How does the library organization work?

You can keep a large digital book collection organized easily:

- Point the app to a specific folder on your device to automatically track and import files.
- Group your books into custom reading shelves and personalized collections.
- Sort your books by title, author name, or your current reading progress.
- Jump back into your recently opened documents with a single tap.

### Are there smart search tools?

You can find phrases and words across giant textbooks without manual scrolling:

- Run a full-text search that indexes your large files safely in the background.
- Select, copy, and share text across all supported formats.
- Use built-in text recognition (OCR) to search through scanned or image-based PDFs.

### How is my data privacy handled?

Your data stays entirely in your own hands:

- The core application works 100% offline without requiring a user account.
- No personal reading data or files are ever shared with third-party networks.
- Advanced smart features temporarily process data on your device without storing it on external servers.

### What features come with the Pro version?

While the main app is free, you can choose a one-time Pro upgrade to unlock advanced tools:

- Smart Tools: Get instant definitions for complex words and automatic summaries of chapters or pages.
- Cloud Sync: Securely link your private Google Drive to sync your books, bookmarks, shelves, and page progress across multiple devices.