Ionic is smart about the platform. In the browser Ionic render like an I
OS device. On an Android device icons, titles, transitions are different because that’s Android recommendation. Also some other components are rendered OS specific, like: popover IOS has rounded corners. In Android Square corners. In a tab pane on IOS the tabs selects are bottom screen. In Android on top and looks different.
Once write code run everywhere.
Since Ionic rel 14 there are more different per OS.