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

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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.