import { AsyncStorage } from 'react-native';
    
const HAS_LAUNCHED = 'hasLaunched';

function setAppLaunched() {
  AsyncStorage.setItem(HAS_LAUNCHED, 'true');
}

export default async function checkIfFirstLaunch() {
  try {
    const hasLaunched = await AsyncStorage.getItem(HAS_LAUNCHED);
    if (hasLaunched === null) {
      setAppLaunched();
      return true;
    }
    return false;
  } catch (error) {
    return false;
  }
}
//import and use elswhere like this

import React, { useEffect, useState } from 'react';
import { Text } from 'react-native';
import checkIfFirstLaunch from './utils/checkIfFirstLaunch';

const App = () => {
    const [isFirstLaunch, setIsFirstLaunch] = useState(null)

    useEffect(() => {
        checkIfFirstLaunch().then((isFirstLaunch) => {
            setIsFirstLaunch(isFirstLaunch)
        });
    }, [])

    if (isFirstLaunch === null) return null

    return isFirstLaunch ?
      <Text>This is the first launch</Text> :
      <Text>Has launched before</Text>
    ;
}

export default App