(This app is super hard to make screen shots for, give it a try, its free, thats the best way to understand it)
This application provides several drawing activities to help any artist, new or old, warm up their Apple Pencil (not required). These activities help you improve your pencil control on the iPad by giving you immediate feedback about your performance. For example, the first activity has you simply trying to draw straight lines. After each stroke, the straightness of your line is compared to the line you could have drawn if were not a flawed human. A feedback line is show, showing you what you should be aiming for. 10-20 strokes, and you will be drawing better, and in with a better body position.
Give it a try, it’s pretty fun, and there are more activities to explore and practice on.
This is one of those apps that was written because the developer wanted it for themselves, but please provide feedback about other activities you would like to see in the app!