• Install packages with yarn or npm install
• Run yarn prebuild or npm run prebuild to start the bundler

NOTE:
Create a local.properties file in the android folder and add the following line: sdk.dir = PATH_TO_ANDROID_SDK
And also follow these instructions
If this is not done, the application will not launch on Android

If you wanna run the application on your physical device:

• Run yarn start or npm run start and download the Expo Go client to the appropriate device
  • iOS: Client iOS
  • Android: Client Android

If you wanna run the application on the simulator:

• iOS: yarn ios or npm run ios
• Android: yarn android or npm run android