Change the Package name:

Go to the file -> android/app/src/main/AndroidManifest.xml

And replace the name after com. With your company and app name like in picture for me my company is drutosoft and app name is drutoshoe so change the package name with your app and company name.

Change the Name of the app

Go to android/app/src/main/AndroidManifest.xml and change the android label name .for reference see the image below–

Change the launcher icon of the app

To change the Icon of the app you need to have a PNG of your app logo and paste it to icon folder with the name of splash.png.. In the path
.. assets/icons/splash.png

And then go to the terminal and run these commands

– flutter pub get

– flutter pub run flutter_launcher_icons

Change the Native splash screen icon:

To change the native splash screen icon you need to do the above launcher icons part and then run these commands in the terminal – one by one

– flutter clean

– flutter pub get

– dart run flutter_native_splash:create

Run the app on a phone or emulator or simulator

To do this part you need to select an emulator for the android and an simulator for ios – like this

And run this command to the terminal.

– flutter run

Result:

Build and Release :

Now Test your apk with command:Flutter build apk --split-per-abi

And test it on your phone. For ios you need to build with Xcode to test it on your phone .. For more info head to
https://docs.flutter.dev/deployment/ios

For releasing it to playstore follow the official guideline in the link below

https://docs.flutter.dev/deployment/android