After the Facebook introduce the React Native, it provides an easier way to create a cross-platform application compared with using an official native method. The project focuses on developing a mobile application in React Native. The React Native can develop the mobile application in Javascript, and will render a native component to construct the Interface conveniently. The most important is it doesn’t need twice development for iOS and Android. Meanwhile, with the fast development of mobile devices along with the shifting of shopping habit from in store to online, the objective of the project is to develop an online shopping app that can be used on multiple platforms using React Native.