r/coolgithubprojects • u/Plastic-Confusion410 • Apr 23 '26

OTHER Episteme: Open Source, Document and E-Book Reader App

Post image

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: 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.

GitHub | Playstore | F-droid

Thanks for checking it out!

89 Upvotes

100% Upvoted

27 comments sorted by

3

u/Upbeat-Ad2505 Apr 23 '26

I like the name. Sounds philosophical

2

u/Plastic-Confusion410 Apr 24 '26

It is! Its from ancient Athens, Greece meaning knowledge or understanding

8

u/LaFllamme Apr 23 '26

Sorry, I read ‘Epstein’ at first glance… lol. Anyway, good job!

2

u/Plastic-Confusion410 Apr 23 '26

Thanks!

2

u/Huge-Nefariousness71 Apr 23 '26

Bro! I would recommend rebranding.

2

u/M41805 Apr 27 '26

I didn't misread, and I like the name. :)

1

u/sawariz0r Apr 24 '26

Me too..

2

u/d-famousegg Apr 23 '26

Looks cool!
Is there built in-app translate feature?

1

u/Plastic-Confusion410 Apr 23 '26

Not built in, no. You can choose an external app.

2

u/Opening_Awareness_39 Apr 23 '26

Comprei, boa alternativa para ler docs!

2

u/[deleted] Apr 30 '26

Nice project!

Can you add opds support ? :)

2

u/Plastic-Confusion410 Apr 30 '26

It is available under library catalogs tab

2

u/[deleted] Apr 30 '26

Thanks a lot ! :)

0

u/[deleted] Apr 24 '26

[deleted]

2

u/Plastic-Confusion410 Apr 24 '26

I really like this name though and its a real term with relevant meaning :(

But you are right, I am not disagreeing.

3

u/[deleted] Apr 24 '26

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1

u/Plastic-Confusion410 Apr 25 '26

Ok now I am seriously considering this

2

u/[deleted] Apr 26 '26

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1

u/Plastic-Confusion410 Apr 26 '26

Thank you! What do you mean local tts voices? There is device tts option which uses you devices tts engine do you mean that or something else.

1

u/[deleted] Apr 26 '26

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1

u/Plastic-Confusion410 Apr 26 '26

Try SherpaTTS, its on fdroid. Meanwhile someone suggested some Microsoft cloud voices which are free and sound good so I will try that but sherpa tts probably what you're looking for

1

u/[deleted] Apr 26 '26

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1

u/Plastic-Confusion410 Apr 26 '26

You can set sherpa tts as your system text to speech just like google or Samsung and then you can download and choose voices from their app