Best process across devices?

I have set up SpamSieve on my mac desktop and began training it, how do I install on my phone, tablet and laptop and bring over the learning and rules.

I have set up my emails as POP on other devices so each is independant.

thanks

If you want to run SpamSieve on two Macs using POP, they will be independent, as you say. You can copy the training data as described here.

However, since SpamSieve does not install on iOS devices, you would need to use IMAP or Exchange (on at least the phone, tablet, and one Mac) so that the phone/tablet will see when the Mac removes spam messages from the inbox. If you end up using it on both Macs, they would no longer be independent, so the instructions for multiple Macs would apply.