Hello , react native i think very easy to use and learn. If you need to download something(file, image, pdf, etc) you can use react-native-fetch-blob. May be i want Impo tantl , each component in a React app abides b st ict data management p inciples. src="https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react.min.js. ">.