Step 2: Create a image file to use as a icon for Apple App store.

To register an app in the Apple App Store, you need to create icon files of various sizes.

You can resize the icons you created one by one, but we will use a simple icon creation site.

https://makeappicon.com/

1. Visit the site and click "Choose file" to select the icon file you created.

2. Write your e-mail address in the space provided for entering the e-mail address. The operating system selects "IOS".

3. When you open a file arriving by e-mail, four folders are included. You only need the above two folders out of 4.

4. The folder contains icon files of all sizes needed to create a sticker app using Xcode.