I use the one for WebOS on my LG TV.
The web client and Android client are lighting fast compared to the TV. Like normal apps loading normal content.
The TV app on the other hand takes like 20 seconds just to get past the splash screen, and then another maybe 10 seconds to show first content. And navigation is laggy af. Just absolutely brutal.
Someone once said this is intentional to get you to buy new TVs. I don't know. Not all apps do this. Jellyfin e.g.