It’s more of a paint program, and it’s great if you have a pen and tablet. I haven’t tried out gimp for while, but it was more of a photoshop alternative at that time. I think Apple’s version of Krita would be Procreate, but Krita is free.

Krita.org does a nice job of showing off their work and so does Blender

They’re not flashy, but they definitely make me want to download them and check them out.