Mobile devices and services have many potential implementations in the area of learning and education. The main advantages of these devices, namely limitless mobility and small size, can bring new dimensions to the learning processes of the students. Problem Processing Assistant (PPA) is a web-based learning tool that combines the characteristics of digital portfolios with the functionality of open problem solving and idea generation tools. A mobile extension of the PPA tool is implemented to enrich its functionality. With mobile device student can compose and read carry-on notes, which brings the PPA closer to the actual learning situation. Extension is implemented using the Multiple Representation Mobile Adaptation (MRMA) framework.