iOS app non-retina and retina images concept

Question

I am asking this question just for information and to clear my concepts about images in iOS application (Retina and non-retina devices

Answer 1

Yes, you can use just the retina images for both retina and non-retina devices. If you use them in imageviews, buttons, etc, make them scaletofill/aspectfill/aspectfit or whatever you want.

But the problem with this is that the unnecessary larger sized images will be loaded in memory, and the resizing of images is going to need some processing as well.

Using separate images does increase the App Bundle size, but reduces the actual ram usage by the application when running.