Flutter screenutil is a great package for screen pixel adoption in different systems like Android and iOS. If you install flutter_screenutil package and initialize it correctly you will your screens looks same on the different platform and yet they are best fitted.
Install it and get
flutter pub add flutter_screenutil && flutter pub get
And then use or call ScreenUtilInit in your MyApp() class.
At the same time you see designSize property. You need to give it a size. At the same time, make sure you have put MaterialApp() inside ScreenUtilInit()