Would be nice to have a very small mobile client that just listed my notifications (i.e. someone has replied to me, liked my note and whatnot) and linked to other apps so I could reply to them, browse more etc.
Discussion
It could do a better job than most do-all-the-things clients out there. For example, you could open it and it would show you a kind of a dashboard with aggregates about reactions to your notes, and ordered replies instead of just a stream of "someone tagged you in this comment but you won't know what comment is until you click or you won't be able to read what they said until you click and if you click you'll lose track of where you were on the list of notifications".
Like the "Simple" suite of apps for Android. Does just one thing, well.