Sensor Tower has released a new data report stating that, in the first four days, the iOS version of Fortnite generated over $1.5 million in revenue from in-app purchases.

Sensor Tower says $1 million of that revenue came just 72 hours after in app purchases went live in the mobile version of Fortnite.

According to our estimates, Fortnite has already grossed more than $1.5 million worldwide on iOS, with $1 million of that earned during the first 72 hours after IAPs went live. This places the game well ahead of its primary rivals in the burgeoning mobile survival game genre during the same post-launch period.

What’s incredible is that Fortnite for iOS is still invite only access — not everyone who wants in can even get in to the iOS version as of now. With that being said, Fortnite is already the #1 free game on the App Store in many regions worldwide.

SOURCE: Sensor Tower