Image sizes and specifications

Ionic resources have some specification of the source image of the icon and splash screen. Images can be either .png files, Photoshop.psd files, or Illustrator .ai files. There is a minimum size requirement for the source images for both. An icon's minimum size should be 192x192 px, and it should not have rounded corners. In case of splash screen, the minimum requirement is 2208x2208 px so that for every platform Ionic can prepare resources. The splash screen's artwork should roughly fit within a center square (1200x1200 px). Additionally, when the orientation preference configuration is set to either landscape or portrait mode, then only the necessary images will be generated.
For creating just icons or splash screen, the ionic resources command has two flags that allow you to create just icons or splash screens, not both:

    $ ionic resources --icon
$ ionic resources --splash

If a proper size is not provided for the source files, this will only create resources that are less than the size of the source image. For example, there might be chances that resources for tablets or high resolution screens are not generated.