This is an app that can be connected to an smart toy. After connecting to the smart toy, the app display, guide, and train the use of the toy using digital twin technology. It also provides functions such as performance analysis, online battles, and rankings. 1. App Timer: Used for timed competitions with regular Rubik's cubes, stacking cups, and sliding puzzles. 2. Physical Timer: Paired with a self-developed Smart Timer. 3. Smart Cube: Paired with a self-developed Smart Cube.