In my experience Reddit had to be used with an app if not on desktop, but the Fediverse on mobile feels like the Reddit app (I'm one of the few people who never had trouble with the official app, it was functional for me, so this is not meant as an insult at all. I left and came here over the API stuff only) so I have no need to switch. Much more mobile-friendly. Using the Fediverse on desktop feels a lot like the mobile experience but wider.