Why YSK: looks very similar and functions like Apollo, if you’re used to Apollo that’s a great app for you, even if you do not, it’s still one of the best apps for lemmy You can install the web app here: wefwef.app/settings/install or just use it on your browser here wefwef.app
I don’t think there are any apps that support both Lemmy and Kbin currently. Artemis says they’ll eventually do both but not sure it’s usable now.
Last I checked Kbin didn’t have an API which is why you see fewer apps for Kbin I guess. Those that work do so by scraping the web pages. Maybe that’s changed in the meantime.