Here are the essential components needed when developing a mobile application: 1. A Project Plan: This should include a detailed timeline and scope of work, identifying all the stakeholders, resources, and risks associated with the project. 2. A Requirements Document: This should be a comprehensive document outlining the specifications of the app, including its features, functionality, design preferences, and any specific technical requirements. 3. Wireframes: These are visual guides that represent the skeletal framework of the mobile application. They are typically used to lay out content and functionality on a page, taking into account user needs and user journeys. 4. Design Mockups: These are high-fidelity designs of each screen of the app, which provide a detailed view of the UI and UX of the app. 5. A Prototype: This is a preliminary version of the app, often used for user testing and to get stakeholder approval. 6. A User Testing Report: This should be a detailed report of user testing, outlining the areas of success and those that need improvement. 7. API Documentation: If the app is using any APIs, then a document detailing their use, endpoints, responses, etc. is required. 8. The Codebase: This should include the complete, well-documented, and tested source code of the mobile application. 9. A Deployment Guide: This should provide detailed instructions for installing, configuring, and running the application. 10. App Store Submission: This should be the completed submission of the mobile application to the respective app stores (e.g., Google Play Store for Android apps, Apple App Store for iOS apps). 11. A User Manual: This should provide instructions on how to use the application. 12. A Post-launch Support Plan: This should outline the plan for application updates, bug fixes, and other maintenance tasks.