To make Application Icons for both iOS and Android, use https://appicon.co/

The advantage of appicon.co is that after adding the base icon image, it generates the set of standard icons, and automatically downloads them to a ZIP file named: AppIcons.

Extract the zip archive, it contains

  • appstore.png: For Apple AppStore
  • playstore.png: For Google playstore
  • android/: A folder of standard Icons for Android
  • Assets.xcassets: A folder of standard Icons for iOS