It worked twice on my phone and then crashed. But from what I can see, it's a good start. I love the circle of equivalent apps because at a glance you get a pretty good idea of what Nostr is and its potential.
I still have a hard time wrapping my head around the idea of promoting Nostr on how much regular people (I hate the label "Normies") appreciate issues like decentralization. I think most of them think in terms of functionality.