Lithium is a lightweight, open-source Android application designed to deliver a clean, distraction-free reading experience for EPUB eBooks, offering smooth page transitions, customizable themes, and an intuitive interface that prioritizes both performance and simplicity for readers who value focus over flashy features.

Key Features

• Supports EPUB format with fast loading speeds
• Night mode and multiple color themes
• Adjustable font size, typeface, and line spacing
• Bookmarking and progress syncing across devices
• Minimalist design without unnecessary menus

Pros & Cons

• Pros:
  • Extremely lightweight and fast
  • No ads or intrusive permissions
  • Simple, user-friendly navigation
• Cons:
  • Limited file format support (EPUB only)
  • No built-in bookstore or online sync service
  • Advanced annotation tools are minimal

Functions

Lithium functions primarily as an offline eBook reader, allowing users to import EPUB files from local storage, organize them into a personal library, and read with full visual customization. It includes a progress tracker, bookmarks, and a table of contents navigator, ensuring smooth access to different chapters. While it avoids complex cloud integrations, its offline-first approach guarantees privacy and reliability without relying on constant internet connectivity.

How to Use

Click the button "Check All Versions" below to download and install it. Once installed, open Lithium and grant storage permissions so it can locate your EPUB files. Tap the “+” icon to add books from your device, then select a title to start reading. Swipe left or right to turn pages, tap the center of the screen to reveal reading options, and adjust font, brightness, or theme from the settings menu. Use bookmarks to save important sections and revisit them easily through the dedicated bookmark tab.