Skip to main content
ReUCM allows you to download books from various supported portals and save them in FB2 format on your device.

Finding books

There are multiple ways to access books in ReUCM:
1

Enter a book URL

On the home page, paste a book URL from a supported portal into the link input field and tap Go. The app will automatically detect the portal and navigate to the book page.
2

Browse portals

Use the built-in browser to navigate through supported portals. When you open a book page, the app will automatically detect it and switch to the book download interface.
3

Access recent books

View your recently accessed books in the “Recent” section on the home page for quick access to books you’ve previously viewed.
You can also share book links directly to ReUCM from your browser using Android’s share menu.

Downloading a book

Once you’ve navigated to a book page, you’ll see the book’s metadata including title, authors, series information, and annotation.
1

Check authorization status

If the book requires authorization and you’re not logged in, you’ll see an alert indicating you need to authorize. Configure your portal credentials in settings first.
2

Start the download

Tap the Download button to begin downloading the book. The app will:
  • Fetch all book chapters from the portal
  • Convert the content to FB2 format
  • Display a progress indicator during the conversion process
3

Wait for completion

The download progress bar will show the current stage:
  • Downloading chapters
  • Converting to FB2 format
  • Processing completed
You cannot navigate away from the book page while a download is in progress. The back button will be disabled until the download completes.

Saving books

After downloading, you have two options for managing your book:

Share the book

Tap the Share button to share the downloaded FB2 file with other apps on your device. The share dialog includes:
  • Book title and authors
  • Series information (if applicable)
  • Last downloaded chapter title
  • The FB2 file attachment

Save to device

Tap the Save button to save the book to your device:
1

Grant storage permission

If this is your first time saving, you’ll need to grant storage permissions to the app.
2

Choose save location

The save behavior depends on your save settings:
  • With save directory configured: The book is automatically saved to your configured directory using your filename template
  • Without save directory: A file picker dialog appears, allowing you to choose where to save the book
3

Confirmation

A success message appears when the book is saved successfully.
The filename will automatically sanitize any invalid characters (< > : ” / \ | ? *) from the book title and series name.

Book information displayed

The book page shows comprehensive metadata:
  • Cover image: Visual representation of the book
  • Title: Full book title
  • Authors: All listed authors
  • Series information: Series name and number (if part of a series)
  • Annotation: Book description or summary
  • Download progress: Real-time progress during download and conversion

Troubleshooting

If you encounter issues while downloading:
  • Download fails: Check your internet connection and ensure the portal is accessible
  • Authorization required: Configure your credentials in settings for the specific portal
  • Conversion errors: Try downloading the book again or refresh the book page
  • Save fails: Verify you’ve granted storage permissions and have sufficient storage space
Pull down on the book page to refresh and reload the book metadata if information appears outdated.

Build docs developers (and LLMs) love