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Material You 3 eBook/audiobook reader — Episteme fork + bookshelf-api/ABS
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Aryan 5483b18549
refactor: remove local pdfiumandroid module and use published artifact (#10) 
Key changes:
*   The `pdfiumandroid` directory, which contained the local library source, has been completely removed.
*   The `settings.gradle.kts` file is updated to remove the `:pdfiumandroid` and `:pdfiumandroid:arrow` includes.
*   The main `app/build.gradle.kts` is modified to depend on the published `io.legere:pdfiumandroid:1.0.35` artifact from a remote repository instead of the local project module.
*   Code in `PdfPageComposable.kt` that depended on `PdfPageObjectType` and logic for handling image objects in dark mode has been removed, simplifying the rendering process.
2026-02-27 13:44:52 +05:30
.github Update GitHub sponsor button with a username (#8) 2026-02-26 18:44:11 +05:30
app refactor: remove local pdfiumandroid module and use published artifact (#10) 2026-02-27 13:44:52 +05:30
docs docs: Revamp README and add APK naming convention (#2) 2026-02-25 19:54:43 +05:30
gradle Initial commit 2026-02-24 17:37:40 +05:30
spotless Update readme (#3) 2026-02-25 21:30:28 +05:30
.gitattributes Initial commit 2026-02-24 17:37:40 +05:30
.gitignore Initial commit 2026-02-24 17:37:40 +05:30
build.gradle.kts docs: Revamp README and add APK naming convention (#2) 2026-02-25 19:54:43 +05:30
gradle.properties Initial commit 2026-02-24 17:37:40 +05:30
gradlew Initial commit 2026-02-24 17:37:40 +05:30
gradlew.bat Initial commit 2026-02-24 17:37:40 +05:30
LICENSE docs: add README, LICENSE, and configure automated license headers 2026-02-25 16:54:51 +05:30
README.md Fix icon and name alignment in readme (#4) 2026-02-25 21:34:06 +05:30
settings.gradle.kts refactor: remove local pdfiumandroid module and use published artifact (#10) 2026-02-27 13:44:52 +05:30

README.md

Episteme Reader Icon  Episteme Reader

A native Android document reader application built with Kotlin and Jetpack Compose.

Get it on Google Play

Episteme Reader Preview

Overview

Episteme Reader is an offline-first application designed for reading various document formats. It leverages native Android technologies and C++ libraries to provide a performant reading experience with customization capabilities.

Note: This is the Open Source (OSS) edition of Episteme Reader. The version available on the Google Play Store is built from this core but includes additional proprietary features.

Features

Supported Formats

  • Documents: PDF
  • E-books: EPUB, MOBI, AZW3
  • Text: MD, TXT, HTML

PDF Features

  • Viewing Modes: Vertical Scroll and Paginated view.
  • Ink Annotations: Draw directly on pages using Pen, Highlighter, and Eraser tools.
  • Text Annotations: Add text notes anywhere on the page using system or custom fonts.

E-Book Features

  • Parsing: Native parsing for MOBI/AZW3 via libmobi and EPUB via Jsoup.
  • Customization: Adjust font size, line spacing, and margins.
  • Custom Fonts: Support for importing user-provided font files (.ttf, .otf).

General

  • Text-to-Speech (TTS): Read documents aloud using the system TTS engine.
  • File Management: Built-in library organization.

Architecture

  • UI: 100% Jetpack Compose (Material3).
  • Architecture: MVVM with Unidirectional Data Flow.
  • Database: Room (SQLite) for metadata and annotations.
  • PDF Engine: pdfium-android (Native PDFium bindings).
  • EPUB Engine: Utilizes standard WebView for vertical scrolling mode, and a custom rendering engine for paginated mode.
  • Mobi Engine: Custom JNI bindings to libmobi.

Building from Source

  1. Clone the repository:

    git clone https://github.com/Aryan-Raj3112/episteme.git
cd episteme

  2. Build: Open in Android Studio and run the ossDebug variant.

    ./gradlew assembleOssDebug

Open Source Libraries

This project is made possible by the Android open-source ecosystem:

  • Core & UI: AndroidX, Jetpack Compose, Kotlinx Serialization
  • Document Engines: PdfiumAndroidKt (PDF), libmobi (MOBI/AZW3), Google WOFF2 (Fonts)
  • Parsers: Jsoup (HTML/EPUB), Flexmark (Markdown)
  • Media & Image Loading: Coil, Media3 (ExoPlayer)
  • Utilities: Room (Database), Timber (Logging)

License

This project is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0). See the LICENSE file for details.