Expo

Start a project without Xcode/Android Studio

Quickly deploy changes to your phone over ngrok, hot reloading

Expo SDK gives ez access to underlying native APIS

Limitations => can always eject though

Managed workflow has only JS and Expo does rest

Bare workflow give full control over native project with Expo SDK, ejection to regular react native project

Constants

import { Platform } from 'react-native';

if (Platform.OS !== 'web')