Course 02 · Intermediate

Build Mobile Apps using Codex

Ship to TestFlight and Play Store with OpenAI's Codex as your pair.

React Native / Expo from scratch with Codex driving. Auth, payments, push notifications, native modules — all via prompts that produce real, reviewable code.

25 lessons5 modules~18 hours0 / 25 done · 0%

Module 01 · Codex + Mobile Foundations

Install Codex, scaffold an Expo app, understand the constraints of mobile vs web.

  1. Meet Codexconcept8 min
  2. Install and Authenticatewalkthrough7 min
  3. Codex vs Claude Codeconcept9 min
  4. Scaffold an Expo Appsandbox10 min
  5. The Mobile Loopconcept10 min

Module 02 · Building UI

Screens, navigation, forms, theming — the visible surface of your app.

  1. React Native Primitivesconcept9 min
  2. Generating Screens from a Sketchsandbox11 min
  3. Navigation with Expo Routerwalkthrough12 min
  4. Forms and the Keyboardsandbox10 min
  5. Theming and Dark Modesandbox10 min
  6. Lists and Performancesandbox11 min

Module 03 · State and Data

Local, global, offline, and live — how data moves through a real app.

  1. Local vs Global Stateconcept8 min
  2. Offline-First with AsyncStoragewalkthrough11 min
  3. Connecting to a REST APIsandbox10 min
  4. Auth with Supabasewalkthrough13 min
  5. Realtime Subscriptionssandbox10 min

Module 04 · Native Features

The capabilities that make it feel like a real app, not a wrapped website.

  1. Camera and Image Pickersandbox10 min
  2. Push Notificationswalkthrough13 min
  3. Maps and Locationsandbox10 min
  4. Haptics and Gesturessandbox9 min
  5. Native Modules and Expo Pluginsconcept10 min

Module 05 · Ship It

From local sim to App Store / Play Store, with humans testing in between.

  1. Building IPA and APKwalkthrough12 min
  2. TestFlight and Internal Testingwalkthrough10 min
  3. In-App Purchaseswalkthrough14 min
  4. App Store and Play Store Submissionwalkthrough16 min