title: Confusion with the use of CupertinoApp and MaterialApp in Flutter
body: <p>I was learning Flutter and came across two types of design MaterialApp and CupertinoApp. So, I wonder if we want to create an app for both android and ios, should we create one separate app with MaterialApp for android and one separate app with CupertinoApp for ios? Or if we, say, create app with only MaterialApp, will ios version of that app automatically get CupertinoApp?</p>