Replacing Flutter App Icon on Android and iOS

Here are the steps to replace the app icon on both Android and iOS:

1. Prepare your app icon in PNG format. The recommended size for the app icon is 512x512 pixels.
2. Go to an App Icon Generator Website like this one (opens in a new tab)
3. Upload your app icon and select Android, iPhone and iPad.
4. Download the app icons file.
5. Replace the contents of the file in the code.

Android

the app icons path is under android/app/src/main/res/.

iOS

the app icons path is under ios/Runner/Assets.xcassets/AppIcon.appiconset/