Changing Unity Free splash screen and icon

Is it required to have the Unity Splash using Unity Free in a commercial app? Or is it allowed to change it somehow, maybe at runtime?

What about the app icon, can it be changed?

The splash screen can’t be changed. You can make an additional in-game splash screen if you want. You’re required to change the icon (at least on iOS, and it would be a bad idea to use the default icon on other platforms).