How create an icon for an app?

Question

I need to create an icon but I do not know which tools I can use (pages). Photoshop is not an option for me.

Answer 1

Android Asset Studio?

https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html

Looks live (first I've seen it, some kind of editor, links to additional icon sources)

Answer 2

You can use this documentation

https://developer.android.com/studio/write/image-asset-studio.html