Build Your First App with Codex (No Experience Needed)

A beginner-friendly walkthrough for building a mobile habit tracker app using OpenAI's Codex desktop application and Expo Go, without any prior coding experience. Covers the full setup process including installing Codex, Expo Go (SDK 55 via TestFlight or APK), and Bun as a package manager. Demonstrates a five-step workflow: setup, project creation, planning with Codex's plan mode, iterative AI-driven development, and running the app on both iOS and Android. The resulting app features SQLite local storage, dark/light mode, tab navigation, and habit CRUD functionality.