Impossible not to have heard of it; since the app came out, Nintendo's shares in America have gone from 16 dollars to a peak of almost 28.
It's a very simple but captivating game, a simplified version of Pokémon that uses geolocation and augmented reality. You go around the city hunting for various Pokémon that must first be framed and then captured, and then there are many new options to unlock. The app is free, although it offers in-app purchases.
However, there are those who consider the app actually the fruit of the minds of "secret services, who thus collect video information all over the world". This was declared by the Russian Minister of Communications Nikolay Nikiforov. The Russian parliament will soon be meeting to discuss the immediate and future dangers of Pokemon GO's spread.
Not to mention the China! The Chinese government would be concerned that the GPS system could indirectly provide the Japanese Nintendo and the US Google with sensitive information such as the position of military bases on Chinese territory. Here too, therefore, many problems.