Export issues – Clean,Merge Duplicate Contacts Review

Wanted an app to export contacts to CSV. This does that, but I have some issues: - No sharing (share sheet), so I can't use the built-in iOS file services like Dropbox. - Doesn't recognize that Dropbox is installed and ask the app to authorize. I don't like the web page for authorizing, since I can't verify that I'm actually signing into Dropbox and not a phishing site. - The app is in development mode and can't actually receive a Dropbox token anyway. - I can't specify the columns/fields to export.
Review by Mr Toner on Clean,Merge Duplicate Contacts.