Here are the general steps for installing apps on LG WebOS:
Turn on your LG WebOS Smart TV: Make sure your TV is connected to the internet.
Navigate to the LG Content Store: Use your TV remote to go to the LG Content Store, which is LG's app store for downloading and installing applications.
Search for Duplecast: Use the search function within the LG Content Store to look for the Duplecast app. If it's available, you should find it in the search results.
Install the Duplecast App: Select the Duplecast app from the search results and follow the on-screen instructions to install it.
Open and Set Up the App: After the installation is complete, you can launch the Duplecast app and follow any setup or login instructions provided by the app.
Please note that app availability can vary by region and TV model, and the availability of the Duplecast app on LG WebOS may have changed since my last update. If you encounter any issues during the installation process or can't find the app, it's a good idea to visit the official website of Duplecast or contact their support for the most current information and assistance.