flutter_dmzj is an open-source third-party client for the DMZJ comics and novel service built with Flutter. It provides a unified interface for browsing digital comics, novels, news, and user-related content. Dedicated comic modules cover home discovery, categories, authors, detailed information, search, chapter selection, and reading. Novel support similarly includes browsing, categories, search, details, chapter navigation, and a dedicated reader. The project targets Android and iOS, with Windows, macOS, and Linux versions provided as beta platforms. Its cross-platform architecture allows much of the same reading experience and application logic to be shared across mobile and desktop systems.