> Conceptually, what could be simpler than a password manager? It’s just a trivial key-value store. In fact, the simplest implementations are usually great. Good examples of simple and safe password managers are keepass and keepassx, or even pass if you’re a nerd.
I think keepass synched via nextcloud is a great solution, e2e encrypted, works basically everywhere (windows mac linux osx ios android) and it keeps the sync and backup in your hands. If copy and pasting a password or using autofill for keepass is too much to ask, then you propably don't care about security.