When building an app you can set its title by using MaterialApp’s title property.
MaterialApp( title: 'App Title', home: MyHomePage(), )
Using title means you won’t be able to change it without rebuilding the entire tree. It is fine for an app. But when it is a web, the title should change to reflect the current page’s feature and for search engine (I haven’t confirmed this).
We have another solution.
package:flutter/services.dart will solve this perfectly.
Put these codes within build method of a screen
SystemChrome.setApplicationSwitcherDescription(ApplicationSwitcherDescription( label: 'My current page title', primaryColor: Theme.of(context).primaryColor.value, ));