[Mezzie]

Procreate and Goodnotes for me.

Using the Apple Pencil with either app gives me the benefits of analogue work and the benefits of digital work. Handwriting helps me remember things, but since the product is digital, it's trivial to move/undo/etc.

And Procreate + Apple Pencil is way better than any other art solution I've found for digital art. Granted I've never tried a drawing tablet with a screen, but an extremely cheap option is still $200. For one that works as well as the AP + iPad you'd probably be looking at near the same price point.

[2fast4you]

For me, it's Shapr3D. It has the most intuitive CAD interface I've ever used and it's all based around the pencil. Pretty killer app, especially if you have a 3D printer.

[digdugdirk]

I've seen some clips of it in action, and it seems like magic. What do you use it for?