Could a person also be allowed to submit a run from iOS? I don't believe there is a difference between the two, but I'll need to eyeball everything a bit more. Maybe a separate category for iOS (it doesn't have hyper mode if I recall) if there is a difference that impacts regular gameplay?

I believe there could be some differences, I googled but couldn't really find a comparison - but I will make an iOS category. Would the same rules apply? I haven't really played it myself so I wouldn't know.

Yes, there are some differences between iOS and Web. For one, there is no such thing as a Hyper Mode. There are also multiple small and big differences between the two. On the web version, it takes ten deaths by hunger/thirst to get their perks. This actually changes the game massively on iOS, because it only takes five deaths by hunger/thirst. When trying to get on "a dusty path", on iOS you only need a compass before embarking. On Web you need a cured meat before embarking. Looking on the wiki, for some things like enemies, there is two different tabs, one for browser version and iOS, showing that both have different enemy lists (with similarities and differences). So yeah, it's considered very different compared to PC. For rules, well, I guess they have to be slightly shanged compared to PC.