I'm confused how this is different from Amber bunkers at all. For nostr apps on either android or desktop, I use amber to login (or more generically, to sign events).
Don't have my mobile? Not signing any events. Not logging in.
Discussion
I think the primary difference is the implementation he mentioned is native to a client / app login authorization, whereas amber is more like an Authenticator app.
It’s the difference between login with Facebook vs Google / Microsoft Authenticator.
There’s similarities but also slight differences.
Login w/ Facebook is "legacy auth" like "hey meta, is this person legit, yes or no?" Horrible.
We're past that with nostr's more simple and less-abusable "who are you?" auth.
I guess my real question here is: is it really impossible to develop an amber-like app on ios for e.g. a single device user? Or is it just that no one's done it?