React Native

the intro

React Native lets you build real iOS and Android apps using the React you already know. You write JavaScript, and the components render as actual native UI — not a webview. One codebase, two app stores, hot reload to keep you sane.

the sample

react, but it ships to the app store

import { View, Text, Button } from
  'react-native'

<View>
  <Text>Hello mobile!</Text>
</View>

the docs