After the concept of a hybrid \ac{OSN} was introduced in the previous Chapter \ref{ch:concept}, this chapter describes the implementation of the concept in a prototype. The prototype is an Android app for the hybrid use of Twitter. The app is named \textbf{Hybrid \ac{OSN}}. In the following, the objectives and decisions made for the selection of the \ac{OSN} and the technology are described. The architecture and its components, as well as individual processes, are then presented.