Here is my Digital ink drawing of a Storm Trooper. Created with Autodesk Sketchbook app on my iPad.
No pencil. Just my index finger
Here is my workspace on Autodesk Sketchbook. Also shared on my old DarkRey and Blurt blogs.
Here is the app for iOS : https://apps.apple.com/ca/app/autodesk-sketchbook/id883738213