You can add brushes to Procreate by downloading .brush files onto your iPad, and then "sharing" them to Procreate.

While there are many great alternatives to Adobe’s creative software tools — such as Krita being a good alternative to Photoshop — there are fewer viable alternatives to tablet-based Procreate. For on ...

You can draw on an iPad with an Apple Pencil on the Procreate app, which you can use to sketch, paint, and illustrate.