Lithium Pro is a paid upgrade for the free Lithium app, offering advanced features like data syncing and custom themes.

Download Lithium Pro from the Google Play Store and install it on your Android device.

Open Lithium Pro after installation, then activate Pro features in the free Lithium app settings.

Key features include Google Drive sync, custom themes, and additional highlight colors.

Adjust theme settings in the display options to customize your reading experience.

Use the bookmark feature to save pages or sections for easy access later.

Share content directly from the app via email, messaging, or social media platforms.

Access detailed info through the app's menu and explore more features in settings.

The app needs Google Drive access; manage permissions in your device settings.

Check for updates in the app store and ensure your Google Drive sync is active for smooth operation.