Chapter 25, Native UI Components Using NativeBase, shows you how to build native user interfaces using pre-built, platform-agnostic UI components.
Chapter 26, Handling Application State, discusses how application state is important for any React application, web or mobile. This is why understanding libraries such as Redux and Immutable.js is important.
Chapter 27, Why Apollo?, explains that Apollo and GraphQL, used together, represent a novel approach to handling state at scale. It is a query and mutation language, plus a library for wrapping React components.
Chapter 28, Building an Apollo React App, shows that the real advantage of Apollo and GraphQL lies in the fact that your state schema is shared between web and native versions of your application.