making an app that aims to be the first. a social network for pot users. cnn s anna has more. reporter: a group of tech savvy 20 somethings launching a hot new app. only this is no silicon valley start up. sometimes you smoke for two hours, sometimes six hours. reporter: he is not your stereo typical business exec. the 22-year-old is the cofounder and ceo of massroots. a free social media network similar to facebook or instagram but this is just for people who love weed. instead of friends or followers, they have buds. place where people can remain semi anonymous and post pictures of pot, shots of smoking while skiing and cannabis creativity. much of the conversation is about products and pot shops. in two months they have amassed $275,000 users.