I've tried a few, and yours rocks. Except...
Every time I open it, I have to tap the [Home] button multiple times. In a #browser, when I reload, I'm instantly current.
I've never written an app for iOS, and it's been a minute since I wrote an Adroid app.
Is this happening because of some #API limit? Could you maybe iterate the process until you get < 10 new posts/boosts? I'm okay waiting some extra time.