Quick answer
A document reader for PDF and E-Books
Episteme Reader is an offline-first, privacy-focused document and e-book reader that supports PDF, EPUB, MOBI, AZW3, Markdown, HTML, and plain text.
Features:
- Documents: View PDF, Markdown (MD), TXT, and HTML files.
- E-books: Read EPUB, MOBI, and AZW3 files using native parsing.
- PDF Modes: Vertical Scroll and Paginated views.
- Annotations: Draw directly on pages (ink, highlighter, eraser) or add text notes.
- Customization: Adjust font size, margins, and import custom fonts (.ttf, .otf).
- Organization: Built-in library management and Text-to-Speech (TTS) support.
This is a completely free and open-source (OSS) app built natively using Jetpack Compose.
Screenshots
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
Frequently asked questions
What is Episteme Reader?
A document reader for PDF and E-Books
Who develops Episteme Reader?
Episteme Reader is developed by Aryan.
Which Android version does Episteme Reader require?
Episteme Reader requires Android API 26 or later.
What is the current version of Episteme Reader?
The synchronized F-Droid version is 1.0.57-oss.
Which license does Episteme Reader use?
The signed F-Droid metadata lists AGPL-3.0-only.
Where is the source code for Episteme Reader?
https://github.com/Aryan-Raj3112/episteme
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