How can I change the app display name build with Flutter?

Android

Open AndroidManifest.xml (located at android/app/src/main)

<application
    android:label="App Name" ...> // Your app name here

iOS

Open info.plist (located at ios/Runner)

<key>CFBundleDisplayName</key>
<string>App Name</string> // Your app name here

or

Don’t forget to stop and run the app again.