Pokémon GO exploded onto the scene in the Summer of 2016. The monster-catching augmented reality adventure quickly gained a passionate following of tens of millions of players, and it absolutely dominated social media for months after its release. Developer Niantic has managed to keep the game popular with regular updates adding new features and new Pokémon, and that continued support has helped it reach a major milestone.
According to a press release from The Pokemon Company (issued as part of a preview of the Pokemon Center in Singapore), Pokémon GO has been downloaded over one billion times. That's nearly one download for every seven people on the entire planet, though some people have certainly downloaded the game on multiple devices. Pokémon GO has far surpassed Niantic's wildest ambitions, and there's no end to its success in sight.
Source: Nintendo Soup