Pokémon Go is a free location-based augmented reality mobile game developed by Niantic. It was released in July 2016 for iOS and Android devices where it has crossed 10 million downloads within  days.
The game allows players to capture, battle and train virtual creatures, called Pokémon, who appear on device screens as though in the real world. It makes use of GPS and the camera of compatible devices. The game is free-to-play, although it supports in-app purchases of additional gameplay items. An optional companion Bluetooth wearable device, the Pokémon Go Plus, is planned for future release and will alert users when Pokémon are nearby.
The game broke the  previous record held by Candy Crush Saga in the United States or any other game in the world.