Trapeze is a newly launched open-source tool designed to simplify the management of native and cross-platform mobile projects using a YAML-based configuration file format. Developed to address the complexities and challenges of mobile project configuration, especially within Mobile CI/CD workflows, Trapeze supports various file formats commonly used in iOS and Android projects, such as Gradle, XML, JSON, and more. It is compatible with traditional iOS and Android apps as well as cross-platform frameworks like Ionic, Capacitor, React Native, and Flutter. The tool automates numerous project tasks, such as incrementing build numbers and swapping configuration files for different environments, which are typically error-prone and time-consuming when done manually. Trapeze is also advantageous for plugin authors, allowing them to distribute configuration files that automate necessary project modifications. It is designed with CI/CD readiness, making it a suitable fit for workflows like Appflow. Trapeze is free to use, open-source, and actively evolving based on user feedback.