Dyad is a free, open-source app builder designed for non-engineers who want to prototype web apps without coding. It allows users to create AI applications locally on their machines, leveraging free API keys from Gemini and connecting to platforms like Supabase and Vercel. Unlike Lovable, which comes with a subscription fee for higher usage, Dyad provides a cost-effective solution for those wanting to build and iterate on apps without financial barriers. The author shares personal experiences using Dyad, noting its user-friendly interface and the ability to develop features rapidly, such as a Trello clone with drag-and-drop functionality. The guide outlines a step-by-step process for setting up Dyad, including downloading the software, obtaining a Gemini API key, and publishing apps using GitHub and Vercel. Practical examples illustrate how to implement features and troubleshoot common issues. The author also contrasts Dyad with Lovable, highlighting Dyad's advantages for users who want to avoid subscription costs while still accessing essential features like GitHub integration and LLM switching. Best practices are emphasized throughout the article. Key strategies include breaking down tasks into manageable steps and utilizing features like summarization to streamline workflows. The author warns against storing sensitive information in the front-end and shares insights on using different models effectively. A comparative analysis of Dyad and other tools—such as Bubble and Base44—shows Dyad performing well against competitors, particularly for users new to app development.