The MindReader web app is an online freely accessible version of the “matching pennies” game. Matching pennies is an old game mentioned in the works of Edgar Allen Poe and analyzed by Claude Shannon, but our implementation is very modern. By visiting, “www.mindreaderpro2.appspot.com”, a user can instantly play on their computer, tablet, or phone and can save their game results by signing into Facebook. The website is part of the larger MindReader project, which collects game data from the app and provides a data analysis platform. We present the inner workings of the project so that academic researchers can easily run and contribute to MindReader.