Recently announced by Epic, Fortnite Battle Royale will soon support cross-platform play and cross-progression between PlayStation 4, PC, Mac and Mobile (iOS, and Android at a later date).
As quoted by Epic Games:
“In partnership with our friends at Sony, Fortnite Battle Royale will support Cross Play and Cross Progression between PlayStation 4, PC, Mac, iOS and eventually Android. This means players across devices can squad up with friends and play together.”
Alongside this announcement, Epic Games also announced Fortnite Battle Royale is coming to mobile devices.