How to build an app that reaches 1 million users in less than two months and gets acquired by Facebook just 4 months after its creation? This is the story of the fun face filter app MSQRD that got started in Garage48 GameHack in Minsk, back in November 2015 and got more than 1 million downloads during the first month after the release. Now it is in the top free iPhone app in the USA, and the TOP-