There’s one in development for kbin that’s intended to work for both iOS and android. It’s honestly looking pretty good. Right now, it’s still in private beta, scheduled to go public mid/late July, but you could always see if there’s still room on the pinned sign up form. I’m sure the dev would love as many testers as she can get

Kbin can be added to you homescreen since it works as a webapp. No native apps for iOS, yet. AFAIK the API is not enabled on kbin.social so that will have to come first before native apps can make use of it.

I think Artemis will be for both Lemmy and Kbin. It’s still in alpha development but should be available for beta soon.