I don't have an iphone, so I have no idea. I think you can install the web version as a progressive web app, by going to your browser and clicking "install" somewhere in the menu when you're browsing lemmy.
MOOOOO! I just made accounts today for both Yiffit and Pawb.Social. So far I'm definitely enjoying Lemmy as a Reddit alternative, and it's making it a lot easier to give up Reddit entirely now that I'm without my Reddit app of choice.
UI is very much like old reddit, while I'm much more used to new reddit. Apart from that everyone is friendly and everything looks to be fairly active!
One question: how do I stop getting bombarded by porn when I'm im browsing All? I'll be browsing all on this Lemmy, and then a post from LemmyNSFW pops up with no blur. I don't mind no blur, but is there a way to exempt other lemmys when searching all?