Apollo is definitely the best (as in, it's so feature complete, stable, integhrated with the OS UI/UX and awesome I don't see any reason why anyone would want to use an alternative) but there are alternative's, for example Narwhal.
Narwhal is criminally underrated. It's so fast and fluid, and you always have access to subreddits by swiping from the right. Apollo is good, but Narwhal deserves more love IMO.
My only complaint about it is it doesn’t use WKWebView, but something else to render web content. This means that any site I open in Narwhal does not use my content blockers and is thus an ad and tracker infested slow as molasses experience.