react-native-iap will help you access the In-App purchases capabilities of your device on iOS, and Android (Play Store and Amazon). In order to initialize the native modules, call initConnection() early in the lifecycle of your application. This should be done at a top-level component as the library caches the native connection. Initializing just before you needed is discouraged as it incurs on a performance hit. Calling this method multiple times without ending the previous connection...