Yes, the primary feature that is being marketed is step tracking, but the app in general is much more than that. It's like how flighty just is a wrapper for the flights API that you could access through Google, yet flighty is the best app for flight tracking nonetheless and is a really cool app.
I think it is long overdue for rebrand, as right now the marketing is "it's a simple utility to show the daily step counts Apple is already collecting anyway, oh and by the way it has awesome offline maps almost no other apps offer", which is a bit of a weird sell.