For cross-platform play and progress, it is absolutely 100% possible for someone playing the desktop or PS4 version of the game to play with a mobile player. Android users, on the other hand, will be left out in the cold and will have to wait a few months before seeing the game head their way. Those that are invited will also get friend codes invites that they're able to share with other players.More news: National Football League insider: Richard Sherman says goodbye to teammates
Per the device's system requirements, one should have iOS 11 on an iPad Mini 4, iPad Air 2, iPad Pro, iPad 2017, or iPhone 6S/SE, not to mention an internet connection. If the game is going to support cross-play with the PS4 and PC, players on a touchscreen device are probably going to have a tough time competing. The game will continue its worldwide dominance because it will now be released for mobile devices later this year too as announced by Epic Games. We know that Fortnite cross-play is possible between rival consoles, as a "configuration issue" temporarily enabled the feature past year.
It's hard to imagine Epic Games themselves envisioning the success Fortnite: Battle Royale had overnight. If you get an invite you will be able to invite friends. There is no information if the Xbox consoles will also support crossplay.
Sign-ups will open on Monday for an invite-only test on iOS; Android will follow "in the next few months". The port also highlights the steadily increasing power of mobile phones and tablets, which can now match the performance of at least the lower end of major 3D console games without issue. Epic tends to update Fortnite on a weekly basis, and there's alsways something getting changes, some newly-introduced items, and limited-time game modes. It's not entirely clear, but we have seen some PUBG mobile games - and PUBG mobile knock-offs - manage to translate that game's basic visuals and gameplay with relative ease.