Apple’s App Store has had a “record-breaker” July, CEO Tim Cook announced Wednesday. He tweeted that Apple paid out more to developers in July than in any other month since the birth of the App Store in 2008. The 55-year-old, however, did not reveal any specific details regarding revenue, except saying that the online store had seen its highest monthly billings so far last month.

He did post another tweet, though, saying that App Store developers, since its launch, had earned over $50 billion at the end of July 2016.

Reports speculated that the popularity of Pokemon GO was the reason behind Apple’s “record-breaker” month. The game, launched on iOS and Android, has taken over the world and has smashed several records. On July 22, Apple announced that the augmented reality game broke the record for most number of downloads in its first week of release. The game generates over $10 million a day for both iOS and Android and has been downloaded an estimated 100 million times since its launch in the beginning of July. Reports said that even if the Pokemon GO craze dies, Apple has already reaped its rewards.

Apple announced in January that customers spent at least $1.1 billion on apps including in-app purchases. Apple earns about 30 cents for every $1 customers spend in the App Store.