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.
Curriculum structure
Module 01 · Codex + Mobile Foundations
Install Codex, scaffold an Expo app, understand the constraints of mobile vs web.
- Meet Codexvideoquizconcept8 min
- Install and Authenticatevideoquizwalkthrough7 min
- Codex vs Claude Codequizconcept9 min
- Scaffold an Expo Appvideoquizsandbox10 min
- The Mobile Loopquizconcept10 min
Module 02 · Building UI
Screens, navigation, forms, theming — the visible surface of your app.
- React Native Primitivesquizconcept9 min
- Generating Screens from a Sketchquizsandbox11 min
- Navigation with Expo Routerquizwalkthrough12 min
- Forms and the Keyboardquizsandbox10 min
- Theming and Dark Modequizsandbox10 min
- Lists and Performancequizsandbox11 min
Module 03 · State and Data
Local, global, offline, and live — how data moves through a real app.
- Local vs Global Statequizconcept8 min
- Offline-First with AsyncStoragequizwalkthrough11 min
- Connecting to a REST APIquizsandbox10 min
- Auth with Supabasequizwalkthrough13 min
- Realtime Subscriptionsquizsandbox10 min
Module 04 · Native Features
The capabilities that make it feel like a real app, not a wrapped website.
- Camera and Image Pickerquizsandbox10 min
- Push Notificationsquizwalkthrough13 min
- Maps and Locationquizsandbox10 min
- Haptics and Gesturesquizsandbox9 min
- Native Modules and Expo Pluginsquizconcept10 min
Module 05 · Ship It
From local sim to App Store / Play Store, with humans testing in between.
- Building IPA and APKquizwalkthrough12 min
- TestFlight and Internal Testingvideoquizwalkthrough10 min
- In-App Purchasesquizwalkthrough14 min
- App Store and Play Store Submissionquizwalkthrough16 min