I just got screwed this because of the heavy handed moderation ATM.

There are 2 very distinct scenarios at play here and they are easily mixed up & confused by many.

1.) Cross-PROGRESSION- the OP is half correct. If you have a linked Epic & PSN account you can play either version keeping all of your progression like it where a single game.

2.) Cross-BUY - This is where the OP is totally wrong (at lease from my personal experience) If you want to play Fortnite on both your PC AND your PS4 then you still need to purchase 2 CLIENTS. I'm assuming the second only need to be a standard if you are sharing progression. But buying 1 version DOES NOT immediately grant you access to the other. This is where i got bit in the ass because my post got auto modded to oblivion and then replied to by a real mod regurgitating this misinformation.

I'd love to be wrong and if I am please feel free to enlighten my own ignorance but there are 2 clear questions being asked here and only one half right answer... be warned!