Bartłomiej Wiśniowski
Select 2016 and 2017 LG smart TVs are getting a scaled-down version of the Apple TV+ app. The app is showing up in some countries in Europe. Its interface is similar to the standard Apple TV app, but it only has access to Apple TV+ content. You won't be able to access the iTunes Store and Watch Now tabs. There are only three tabs in the app: Apple TV+, Search, and Settings.
The full Apple TV app lets you access Apple TV+ and à-la-carte Apple TV Channels, iTunes libraries, and buy or rent from the iTunes Store.
Source: MacRumors