In order to render meaningful content when the user opens your application offline, your application state needs to be persisted to disk.
Instead of reinventing the wheel, Redux Offline uses the excellent redux-persist library. Your Redux store is saved to disk on every change, and reloaded automatically on startup. By default, browser environments will use IndexedDB or WebSQL/localStorage fallbacks via localForage, and AsyncStorage in React Native.
You can configure every aspect of how your state is persisted.