—In this paper we present Moppy — an application for mobile object position prediction. Moppy is an easy to use, intuitive application with interactive graphical user interface and result visualization. The main purpose of Moppy is to predict an unknown position of a mobile object based on frequent trajectories discovered from historical movement data. In this paper we present an overview of Moppy’s features, including input data formats, mining algorithms employed by Moppy, and visualization of prediction results. Some research issues pertaining to the development of Moppy are also briefly discussed in this paper.