https://www.gamespot.com/articles/fortnite-android-released-for-free-to-all-no-invit/1100-6462461/

Fortnite: Battle Royale has been available on Android for some time now, but it was not freely available for download to everyone. That's now changed, as Epic has released the game on Android without the need for an invite. The beta had previously been invite-only, but as of today you can download it to any Android device for free, without waiting. Unlike most Android games, Epic isn't offering Fortnite through the Google Play store, but instead on its official site.

Epic accompanied the announcement with recommended system specs for your Android device to get the optimal experience. You can check the list of supported devices to make sure yours fits the bill. Here's how to download it.