This is a Hackernews clone site built with next.js implementing GraphQL APIs, for which Apollo Client is adopted in the frontend and Apollo Server in the backend server. We can successfully build a full functionality of GraphQL server with next.js, including queries, mutations, and subscriptions.

The real-time communication of subscriptions however was found not to function well once the package is deployed to Vercel, which is a serverless platform. Therefore real-time Firebase Cloud Firestore is used to substitute GraphQL subscriptions.

In addition, iOS and Android mobile apps are also delivered for the clone site. The apps are developed with React Native, anyone who is interested can test the apps through the Expo Publish Link as above with Expo Go app.