Harry Potter: Wizards Unite arrived in the United States and United Kingdom yesterday, and fans of J.K. Rowling’s wizarding world and location-based AR mobile gaming have sent Niantic’s title to No. 1 on Apple’s U.S. App Store free apps chart. Preliminary estimates based on Sensor Tower Store Intelligence data place its installs at 400,000 and counting, with gross player spending of at least $300,000 across the App Store and Google Play.

It took about 15 hours for Harry Potter: Wizards Unite to reach No. 1 for free app downloads on the U.S. App Store. Niantic’s previous release, Pokémon GO, debuted at No. 1 when it launched on July 6, 2016. It was installed approximately 7.5 million times in the U.S. during its first 24 hours; it did not launch in the U.K. until seven days later.

Harry Potter: Wizards Unite is currently ranked No. 102 overall for U.S. iPhone spending and No. 48 for U.K. revenue. At this point post-launch, Pokémon GO was No. 1 on the U.S. App Store’s top grossing chart, and had generated approximately $2 million in player spending.

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