This tutorial guides you through building a real-time mobile chat app using 3factor architecture, which leverages real-time communication, eventing, and serverless computing for efficient full-stack app development. The guide covers setting up Hasura GraphQL engine, creating necessary tables and views in Postgres, deploying cloud functions with Google Cloud Functions, and implementing the frontend using React Native and Expo. It also discusses handling user registration, adding users to rooms, sending messages, subscribing to chat rooms, and managing push notifications. The 3factor architecture simplifies app development by improving developer experience on the front-end and abstracting away the development operations.