Planning and research in mobile app development involves defining app objectives, target audience, and market requirements. This phase includes competitor analysis, user research, and technical feasibility assessments. Key elements such as user experience design, functionality, and platform selection are evaluated. Stakeholders gather to outline project scope, timelines, and budget constraints, ensuring alignment with business goals. Prototyping may occur to visualize concepts before development begins. This foundational work informs subsequent design, development, and testing stages, facilitating a more structured approach to app creation.