react native

npm install -g expo-cli
expo init AwesomeProject
npm i -g react-native-cli -- this need to run when you need to add navigations

cd AwesomeProject
npm start # you can also use: expo start


In visual studio code install React Native Tools


in App js for navigation do this :

import { createStackNavigator, createAppContainer } from 'react-navigation';
import Settings from './Settings';
import Home from './Home';


const MainNavigator = createStackNavigator({
  Homescreen: {
    screen: Home, navigationOptions: {
      header: null,
    }
  },
  Profilescreen: { screen: Settings },
});

const App = createAppContainer(MainNavigator);

export default App;

--- 
For TextInput to be treated as hidden 
secureTextEntry={true}