Episteme Reader is a native Android app for reading various document formats.

It's offline-first, free and ad-free, and respects your privacy.

Supported Formats:

• Documents: PDF, DOCX, ODT/FODT
• E-books: EPUB, MOBI, AZW3, FB2
• Comics: CBR, CBZ, CB7
• Plain Text: Markdown (MD), TXT, HTML

Key Features:

• PDF Annotations: You can draw directly on pages using a pen or highlighter and add text notes using system or custom fonts.
• Reading Modes: Supports both vertical scrolling and paginated views.
• E-book Customization: Adjust font sizes and line spacing. You can also import your own font files (.ttf, .otf).
• Text-to-Speech (TTS): Includes a built-in TTS feature using Android's native TTS engine.
• Library Management: A built-in system to organize your local files.
• Local Folder Sync: Select a folder to see all its supported file in app and sync reading positions and annotations using local sync tools like SyncThing-fork.
• Themes: You can change the page and text color across all formats.

The app is licensed under AGPL-3.0. I’m looking for feedback and would love to hear any feature requests you might have.

GitHub | Playstore | F-droid

Thanks for checking it out!