The document appears to be a final report from Chan Kim and Justin Wang on their Splitter app prototype. It discusses their motivation for the app, which is to easily split group expenses. It then covers their prototype progression from paper to interactive to working code. Various screens and features of the prototype are shown and described, including user profiles, group events, payments, and a new user experience flow. Feedback from testing earlier paper and interactive versions is also included, along with next steps like a targeted mobile app and possible PayPal integration.