How do I change the app icons and the app splash screen?
Here is a nice Learn Ionic tutorial on how to Add an App Icon
The Splash Screens have caused quite a few issues in the past, as a quick search of this forum will show! However, as of Cordova 3.6, you should be able to add Splash Screens the same way as you add icons - in the config.xml.
Here’s a link to the official Cordova doc for Icons and Splash screens
And here is a recent forum post on the subject
Hope that helps!