index.js

import MyApp from './lib/js/re/myApp.js';
import { AppRegistry } from 'react-native';
AppRegistry.registerComponent('momirreason', () => MyApp);

myApp.re

open ReactNative;

let component = ReasonReact.statelessComponent "MyApp";

let make _children => {
  ...component,
  render: fun _ =>
    <View style=Style.(style [flex 1., justifyContent `center, alignItems `center])>
      <Text value="Is reason awesome?" />
    </View>
};