Easy way to create icon and app launch image?

IS there an easy way to create and add all icons sizes and launch screen in all resolutions and sizes?

so i have found this page tha does the app icons
But i have not found a working Launch screen maker. It would be a helpful functionality if UE4 could handle automatically this, just like Unity does

For anyone else finding this I used for making Launch screens. You put in all the dimensions and then export a .csv which you can later import and you will get all the dimensions. So you write out the dimensions once and then it’s easy to make them.

It would be nicer if ue4 handle this