Too Long; Didn't Read
Daniel's Caliverse is a mobile app for body weight fitness. He started working full-time as a software developer when he was 12 years old. He has had several side projects - Fantasy Hockey for KHL ice-hockey league, navigation app that allows users to race each other, search engine which allows to rate and comment on each search result and of course - bunch of different computer games. He says that a combination of determination and passion for the thing you are doing is the key to success.