Can 1password add this function? Sometimes we want to synchronize data from one safebox to another safebox. For example, from icloud to dropbox. Then we easily use 1password app between iPhone ,Android,Windows phone and PC.
Thanks for taking the time to write in with this request. While we almost never say "no" the answer here unfortunately is "probably not." The reason being we used to have this. It used to be possible to sync with both iCloud and Dropbox. The problem was that doing so would often create conflicts and cause other difficulties and as such it was deemed that having that option created more problems than it solved.
1Password can sync with Dropbox from all of the platforms that you mentioned, so that may be your best solution.
I'm sorry that I don't have the answer you were hoping for, but I hope that helps explain the situation.