My own unanswered question:
Can this work offline?
I spend a lot of time in areas with no signal. So I am uncomfortable with apps that require a connection to a remote server to work with my own data. Besides connectivity issues, there is also the possibility of a poorly-timed service outage, or an eventual permanent shutdown. Bottom line, I have a strong preference for what I call the "KeePass" model: local-first encrypted data, that can be optionally synced for convenience.