Episteme Reader Offline Document Viewer

Episteme Reader is a document and e-book reader by developer Aryan that handles PDF, EPUB, MOBI, AZW3, Markdown, HTML, and plain text files. It is designed for people who want to read on their Android device without giving up control over their data or needing a constant internet connection. The app works offline first and focuses on privacy, so you can open and manage your reading materials without relying on cloud services. It solves the problem of juggling multiple reader apps by offering a single native tool that parses common e-book formats as well as standard documents. Built with Jetpack Compose, it provides a modern interface that is free to use and open source. Whether you prefer scrolling through a PDF or turning pages in an EPUB, the app gives you several viewing modes and annotation tools to make reading more comfortable and productive.

Key features

• View PDF, Markdown (MD), TXT, and HTML files directly in the app.
• Read EPUB, MOBI, and AZW3 e-books with native parsing for accurate formatting.
• Switch between Vertical Scroll and Paginated views for PDFs.
• Annotate pages using an ink pen, highlighter, or eraser, and add text notes.
• Adjust font size and margins, and import custom fonts in .ttf or .otf format.
• Manage your collection with built-in library organization tools.
• Listen to documents and e-books using Text-to-Speech (TTS) support.
• Fully free and open-source (OSS) with no ads mentioned in the app description.

How to install

1. Tap the download button on this page to get the APK file (26 MB).
2. When Android asks, allow your browser or file manager to install apps from unknown sources (look for the 'Install unknown apps' setting).
3. Open the downloaded APK file from your notification bar or file manager.
4. Tap 'Install' and wait for the installation to complete.
5. Open the app from your app drawer or home screen after installation finishes.

Episteme Reader is ideal for beginners who want a straightforward, no-cost way to read PDFs and e-books on their Android phone or tablet. It suits people who value privacy and prefer to keep their reading materials local rather than syncing to the cloud. Students, casual readers, and professionals who need to annotate documents or listen to text will find the built-in tools useful. The app's support for multiple formats means you can replace several separate reader apps with one tool, making it a good starting point for anyone new to managing digital documents and e-books.

To get the most out of Episteme Reader, explore the 'Customization' settings to adjust the layout to your liking—try changing the font size and margins for comfortable long reading sessions. If you have your own fonts, you can import them as .ttf or .otf files. For PDFs, experiment with both Vertical Scroll and Paginated modes to see which feels better for your material. Use the annotation tools to highlight important passages or add notes, and don't forget to try the Text-to-Speech feature when you want to listen instead of reading.

Episteme Reader offers a solid, free, and open-source option for reading a variety of document and e-book formats on Android, with useful annotation and customization features. It is a practical choice for anyone looking for a privacy-friendly, offline-first reader that covers most common file types without extra costs.