You can access this code in expo-ship repository under expo-ship-gpt branch.

Pre-requisites

To build your own GPT app you’ll need to have OneSignal, RevenueCat, Supabase setup.

Follow these tutorials if you haven’t set them up yet:

Set up Supabase

Set up user authentication with Supabase

Set up One Signal

Set up push notifications with One Signal

Set up Revenue Cat

Set up in-app purchases with Revenue Cat

That’s it! Once you have completed the above steps, your app is ready to go. For more information, check the JavaScript documentation.