An anonymous reader writes: Pokemon Go is now the biggest mobile game of all time in the U.S. Not only has it surpassed Twitter's daily users, but it is seeing people spend more time in its app than in Facebook. An earlier report from SimilarWeb says Pokemon Go has surpassed Tinder in terms of installations -- the app surpassed Tinder on July 7th. Today, the tracking firm says Pokemon Go has managed to surpass Twitter in terms of daily active users on Monday. It says almost 6% of the entire U.S. Android population is engaging with the app on a daily basis. A new report from SurveyMonkey intelligence indicated that Pokemon Go has claimed the title "biggest mobile game in U.S. history." The game saw just under 21 million daily active users in the U.S. on Monday. It's reportedly closing in on Snapchat on Android, and could surpass Google Maps on Android as well. According to app store intelligence firm SensorTower, the average iPhone user on iOS spent 33 minutes catching Pokemon, which is more than any other apps it analyzed, including Facebook, Snapchat, Twitter, Instagram, and Slither.io. The app with the second-most average usage at 22 minutes, 8 seconds, was Facebook. SurveyMonkey did note that Pokemon Go still falls short of other games when it comes to time spent in games. Game of War sees nearly 2 hours of total daily usage for the average user, while Candy Crush Saga sees daily usage of about 43 minutes. In just two days, Pokemon Go brought Nintendo's market value to $7.5 billion. It's worth noting that it remains to be seen whether or not the game will continue to break records or turn into a ghost town like Nintendo's first mobile game, Miitomo.