AFAIK, Apollo also has extensive moderator support (I'm not a mod so I can't speak to it but fairly confident it exists) but yeah, no iPad support which really sucks.
I took a look at Boost and it's really nice! Looks extremely similar to Apollo to the point that I think they may have just duplicated the Apollo app on Android and this is not a bad thing at all. I was considering doing the same for HN.