Clifford Amarteifio developed two core desktop applications for the Michaelkelly71/Acity_CPP_Project repository over a two-month period, focusing on practical data management solutions. He built a Java-based GPA Calculator with a Swing GUI, enabling users to input student details, grades, and course credits, while implementing file I/O for persistent record storage and retrieval. Clifford also delivered an Expense Tracker application, providing expense categorization, monthly and yearly views, and file-based data persistence. His work emphasized clean, object-oriented design and robust GUI development, establishing foundational project structures and feature sets without major bug fixes, and laying groundwork for future enhancements and analytics.