Cognitive aids helps people with cognitive disorders to live a more ordinary life. Abiliais a company that develops and sells assistive technology to people with differentdisorders. One of their products, MEMOdayplanner 3, is a planning board that helpsusers to remember activities and structure their daily lives. The product consists of awhiteboard with integrated lights to help visualise the concept of time.The purpose of this thesis was to further develop the product and implement newfeatures and make it more user friendly. A prototype was to be built for testing andevaluation of said features. The work consisted of upgrading the electronic system toadd the new features and also make the unit cheaper and easier to manufacture.Different alternatives for a new user interface were investigated to find a solution thatwas easier to navigate and understand.The result was a working prototype that included an upgraded graphical user interfaceas well as several new features. The prototype provided more freedom to change andcustomize the product based on personal preference. Moreover, navigating the menusand changing settings were easier and more intuitive on the prototype compared tothe original product.