The blog post on Neven Mrgan's website discusses the various sizes needed for IOS app icons. It emphasizes the importance of creating icons in multiple sizes to ensure optimal display on different devices, ranging from iPhone settings, Retina iPad Spotlight, to iTunes. The article also provides a step-by-step guide on how to properly design these icons while considering the potential mask applied to them by Apple.
All the sizes of iOS app icons - Neven Mrgan’s tumbl