React Native lets you build mobile apps using only JavaScript. It uses the same design as React, letting you compose a rich mobile UI from declarative components. The focus of React Native is on developer efficiency across all the platforms you care about - learn once, write anywhere.

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React Native brings what developers are used to from React on the web — declarative self-contained UI components and fast development cycles — to the mobile platform, while retaining the speed, fidelity, and feel of native applications.

By the end of this tutorial, you’ll be familiar enough with React Native to start writing your own apps right away. We’ll go over setting up a project in Xcode, installing third party modules and components, linking libraries, styling with flexbox, creating a custom gesture listener, and many other things.

Besides powerful version control and project management, the Gitlab ecosystem also integrates tools such as Gitlab CI, that allows developers to streamline and optimize the testing and deployment stages of your app development lifecycle. In this article we will tackle the steps needed to implement continuous integration to your React Native apps in Gitlab, and help you maintain momentum in your team by offering constant availability of your builds for testing, demo and release purposes.