WonderPen is a professional writing software designed to provide authors with a focused and smooth writing experience. It supports multiple platforms, including Windows, macOS, and Linux, with features such as tree directory management, document annotation, multi format export, offline priority, and cloud synchronization. In addition, there are focus mode, minimalist mode, typewriter mode, etc., which support Markdown syntax and one click typesetting, provide personalized customization and statistical analysis, and help authors write efficiently.