In any case, it should be noted that Fortnite Mobile only supports a selection of iOS devices.
While open to all iOS users, Epic reminds that there are restrictions on what iPhones and iPads can play the game. However, it does not support the iPhone 5S, 6, 6 Plus, and the iPad Air, Mini 2, Mini 3 and iPod Touch. With the ability to cross-platform play with Xbox One, Playstation 4 and PC players, the mobile version offers the complete and enjoyable battle royale experience that players have come to love, as it includes the same gameplay, updates and map. On landing, participants have to scavenge for weapons, ammo, and resources for constructing buildings, while at the same time killing their opponent in a slowly shrinking battlefield.
If you weren't fortunate enough to receive an invite to said closed beta, you're in luck now.
When you download Fortnite for iOS, you'll be taking your first steps into a world that revolutionized the battle royale genre. Don't forget to use the same Epic account to log in if you've also played on other platforms - your progress will carry over and you can even play with friends on other platforms!