Yoda Response: Explain, I shall. In a project for a movie streaming app, used GraphQL APIs and Apollo Client, I did. GraphQL, for fetching specific data required by the app, very efficient it was. Apollo Client, integrated into the Android app, I did. Queries and mutations, defined and executed using Apollo, I did. Handled caching and real-time updates with Apollo's built-in features, I have. Result, a responsive and efficient data-fetching mechanism, it provided. Technologies involved, Kotlin and Apollo Client, they were.