I've been look forward to something like this. But, this particular app will have trouble catching-on until it works with at least one other client (esp. a desktop client). And that will require that this app to be open-sourced. The sooner it's open-sourced, the sooner other developers can start making interoperable clients.

I am interested to see how this app handles relay outages. Because how a Nostr client handles relay outages will make-or-break that client in the eyes of users in the long-run. In case the developer sees this, I have ideas for how to deal with relay outages.