Swing mainly consists of Swing Engine and Swing Server. Swing Engine is a Unity Asset that provides functions and sample source code for generating efficient object-data-based replay contents. Swing Server manages those contents sent by the engine to easily share replays on-demand or even broadcast alive. Using Swing Engine is free of charge, while using Swing Server has cost rate similar to Amazon Web Service. But using Swing Server is not mandatory. Developers can choose to build their own server and Swing Engine supports local file management functions to facilitate the work.