Yesterday it was announced that Fortnite: Battle Royale will be coming to IOS and Android.
On March 12, they will have an invite code event for IOS. Only people who get invite codes can invite other people.
They have not specified when the Android app will come out, but they are still letting you crossplay between mobile and every other platform except Xbox. This is a giant step for a popular game that has over 3.4 million players. This will let people play who don't have a console or PC. This will be a giant step for this ever-growing online mmpg.