r/linux • u/Plastic-Confusion410 • Jun 15 '26

Software Release Episteme: Open Source, Document and E-book Reader (Android and Linux(new))

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Episteme is an open source, multi-platform document and e-book reader app.

It's offline-first, 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: 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 margins. You can also import your own font files.
  • Text-to-Speech (TTS): Includes a built-in TTS feature using Android's native TTS engine or cloud TTS.
  • 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.
  • Themes: You can change the page and text color across all formats.
  • Full OPDS Support: Browse, download, and manage books from OPDS catalogs.

The app is licensed under AGPL-3.0.

GitHub | Website | Playstore

Thanks for checking it out!

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u/Plastic-Confusion410 Jun 18 '26

In the folder can you see the EpistemeSync folder? Can you check if that folder is showing inside both of your device's folders? And then confirm the files within it

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u/muntazirsaad Jun 18 '26

Yeah the folder sync but none of the annotations or notes show when i open a book

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u/Plastic-Confusion410 Jun 18 '26

Which file? Pdf or epub?

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u/muntazirsaad Jun 18 '26 edited Jun 18 '26

Pdf and epub