Transferring Reminders app lists between devices without syncing via iCloud

Unfortunately, because I have different devices with different reminder lists, syncing via iCloud doesn't work for me. I would need 6 iCloud accounts. Each list needs to be kept seperate. Some lists hold sensitive information from companies that don't allow iCloud syncing because of security issues and constant data leaks. Is it true that Apple offer no 'Save To Device' option for this app? If true it's simply not an option for me.

[Re-Titled by Moderator]