Creating a chatbot app like ChatGPT involves several key steps. Start by defining the chatbot’s purpose and desired features. Next, choose a suitable development platform or framework that supports natural language processing. Design a user-friendly interface and develop a conversational flow that addresses user needs effectively. Implement machine learning algorithms or integrate with pre-built language models to handle interactions. Test the chatbot thoroughly to ensure it performs well and refine it based on feedback. Finally, deploy the app and provide ongoing updates and support to enhance its capabilities and maintain user satisfaction.