Deskscribble 4+

This one is good. It works well. I’m teaching onlne due to Covid precautions. This Describble lets me annotate my class notes while I’m teaching. I teach music, so this is a quick way to draw musical symbols, label items, etc. Once I figured out how to adjust my pencil width, I was good to go! It’s a little cumbersome, but it works well for me at this point. Thanks for a free, handy app to draw on my screen.

Deskscribble also works great on your Mac when you connect an iPad with Apple Pencil as the input device (using Apple's Sidecar feature).

This is even better than drawing with a stylus on a Wacom tablet, because now you can draw directly on your iPad's screen, which is showing the same content as your Mac.

You can even apply pressure on the pen and lines will draw thicker!

I use it for my online classes, very useful