Grossing $25 million in its first 30 days, Fortnite mobile has become one of the most successful apps on iOS, despite launching as an invite-only test event.
Since going public on April 1, the average worldwide daily spend has exceeded $1 million according to market intelligence firm Sensor Tower.
Second only to Netflix in terms of US consumer spending, Fortnite earned $9.5 million in the first two weeks of April.
Outsripping Tinder by $1 million and Candy Crush by $4 million, Fortnite also dwarfed Pandora by $700,000, YouTube by $2.3 million, and Hulu by $5.1 million
Fortnite is currently only available on iOS, but if a Google Play version materialises soon it could prove a colossus success for Epic Games.
Randy Nelson, head of mobile insights at Sensor Tower, commented: "Should that happen by summer -- and if the title is able to maintain its current hysteria-level popularity among gamers for a few more months -- our estimates indicate the game could be poised to gross more than $500 million by the end of 2018 across both platforms combined."