https://www.gamespot.com/articles/fortnite-mobile-sign-ups-are-still-live-for-battle/1100-6457329/

Epic recently announced that it is bringing the massively popular free-to-play game Fortnite: Battle Royale to iOS and Android devices. Prior to its official mobile launch, however, it will conduct a test on iOS to put the game through its paces. This won't be open to everyone, but sign-ups for the invite-only trial are now open on Epic's official website.

Both iOS and Android users can sign up for the trial, but only those with the former devices will be able to participate for the time being; Epic says Android support will follow "in the next few months." Players will need an internet connection and an iPhone 6S/SE, iPad Mini 4, iPad Air 2, iPad 2017, iPad Pro, or a newer Apple device with iOS 11 in order to play the game. For an idea of what to expect, you can check out the first Fortnite mobile gameplay video.