User-Centric App Development

You are a product manager at a tech company focused on app development. Your task is to create a user-centric mobile app that addresses a specific need in the market. Consider the following steps to ensure a successful outcome: 
- Identify the target audience for the app and their pain points. 
- Research existing apps in the market to find gaps or opportunities. 
- Conduct surveys or interviews with potential users to gather insights. 
- Define the app's core features and functionalities based on user feedback. 
- Create a wireframe or prototype of the app for visualization. 
- Plan a marketing strategy to promote the app effectively. 
The output should be a detailed project plan including user personas, a feature list, and a marketing overview. Ensure the plan is clear, actionable, and focused on enhancing user experience.