App.js

import { registerRootComponent } from 'expo'
import clone from 'lodash/clone'
import React from 'react'
import { I18nManager } from 'react-native'
import Nav from './src/app/App'

class App extends React.Component {
  async componentWillMount () {
    try {
      // I18nManager.swapLeftAndRightInRTL(true)
      // if (Platform.OS === "android") await I18nManager.forceRTL(true);
      if (!I18nManager.isRTL) { await I18nManager.forceRTL(true) }
    } catch (e) {
      console.warn('RTL Error', e)
    }
    console.ignoredYellowBox = ['Setting a timer']
    const _console = clone(console)
    console.warn = message => {
      if (message.indexOf('Setting a timer') <= -1) {
        _console.warn(message)
      }
    }
  }

  render () {
    return <Nav />
  }
}

export default registerRootComponent(App)