The document describes the Satin project which aimed to create a participative toolkit and open platform for designing, sharing, and selling mobile applications. The design group focused on developing the user interface between users and the Satin platform. User testing found that while users could construct app functionalities, they struggled to see advantages over existing apps and could not come up with tailored solutions. The document concludes that the current infrastructure has limits in supporting collaborative design tools, and that new foundations are needed based on contextualized, situated information generation to achieve user centeredness.