4 years later, and 'Pokémon Go' players have spent nearly $4 billion on the wildly popular smartphone game (NTDOY, GOOGL)

Just over four years ago, "Pokémon Go" launched for smartphones and sparked a worldwide phenomenon. With tens of millions of players around the world, "Pokémon Go" has been a smash-hit success: Players have spent nearly $4 billion on the game across the last four years, according to Sensor Tower data. As the years have gone on, player spending has actually increased — 2019 was the game's biggest year since launch, with nearly $1 billion spent. Visit Business Insider's homepage for more stori...