Connecting to S Planner on a Samsung S5

I have used the S Planner on my Samsung S5 as a calendar (which it is). But now want to access and bring together appointments from my pc and tablet as well  - using eM Client. But search as I can, I cannot find a way into or out of the S Planner, though in the past I was synching it with Outlook on an earlier laptop. Perhaps I should take this to the Samsung community, but there again someone may know the answer here…