While you're waiting on a kbin app, you should know the mobile site is entirely functional as a mobile app. Just make a shortcut for your home screen
Apps are always nice, but lots of mobile websites, including the kbin one, are entirely functional as an app. In your browser you can just make a shortcut to them, and they'll appear on your home screen and act as an app.
In technical terms these are Progressive Web Apps, but it means you don't need to wait for someone to write an app (or kbin to have a good API for doing so) to use it like an app on your phone.
In Firefox it looks like this. Open the website, in the menu hit Install, drag the icon to your desktop. When you click on it it'll open the site like it's a standalone app.
Chrome is exactly the same, but the menu button is "Install App" instead.
One thing I wish both the desktop and mobile app had was the ability to collapse comment threads. It's handy to just be able to quickly click to collapse a thread at the highest level and move on to the next one. Jerboa has that function for Lemmy, but for some unknown reason they don't allow the user to change comment sorting (eg. top comments). It just forces chronological comment sorting.
Man I wish Relay was available for either Kbin or Lemmy... sigh