Painterly rendering is among the most popular non-photorealistic rendering techniques and has been employed in many applications. Research on painterly rendering mainly focuses on automatically generating artistic results. In this study, we aim to develop an entertaining and interactive application for painterly rendering with touchscreen mobile devices. The proposed application provides user interaction for added enjoyment and ensures high-quality painterly results. We provide a method for finding the appropriate position of the brush stroke around the points touched by the user and for generating and rendering the brush stroke. With the proposed method, users can quickly generate high-quality painterly results.