This document discusses the development of a mobile learning diary application for a MOOC (Massive Open Online Course) platform called iMooX. The goal was to create Android and iOS apps to help students keep track of courses, events, and learning progress. A prototype app was designed and then working apps were developed for both platforms. The apps were tested through surveys, with most students reporting that the app helped increase their learning progress and keep organized. While the apps showed promise, limitations around offline usage, gamification, and login functionality need further work. Overall, the project demonstrated how a mobile learning diary app can support students on a MOOC platform.