I'm testing out all the ones I can find for android. I've got Jerboa, Connect, Thunder, Summit, and Lemmynade. At this point, all of them have some missing features/functionality here and there, but my favorite so far is Lemmynade.
Several of these are not on Play Store, only on F-Droid or directly from Github. I know Lemmynade is only on Github for now, and 1 or 2 of the others but I don't remember which.
I just had a very specific setup in Joey for Reddit that was exactly the way I wanted it to be, with a layout that mostly supported a left handed mode and a bottom navigation bar, and customizable compact modes and a really huge amount of customizable options in general for the UI and how things are displayed/laid out.