Yea Aqua is solid. That was my first recommendation for a mobile application. It just if they lose their keys then it’s gone.
Coinos is great. Yet mobile apps are more handy and no coiners will always have on their phone as a reminder. Websites get forgotten or deleted or cleared with cache. My first go to is nostr:npub1ajlrwgfj4yerhqf7ady03h7wmtk2qr3gs7h3sxcx83k05yld36sswpzx3q
Discussion
But you mentioned privacy and self sovereignty ;)
Non custodial I would go with nostr:npub13ljnkd633c7maxatymv3y2fqq8vt3qk7j3tt0vytv90eztwgha9qmfcfhw
Yea you’re right about that.