Third-party apps cannot be installed on LG's WebOS platform. But, by following these instructions, you may visit the LG Content Store and download and set up a number of apps:
1.Use the remote to navigate to the LG Content Store and pick the app you wish to install.
2.As an alternative, you can sideload the APK file to the TV with a USB after downloading it. In order to access them, you may need to use a media streaming device, such as a Fire TV Stick or a streaming box.
Nevertheless, you must activate Developer Mode on your LG Smart TV in order to install applications from sources other than the LG Content Store.