I've been making some and converting some of the stamps I own on my iPad. I use Procreate. I like coloring them, it’s not easier. It’s just like coloring with real markers or watercolor brushes. It did have a little bit of a learning curve.
I use digi stamps (brushes) on some of my LOs. I do like using them but if you are a 12 x 12 scrapper you do need a wide format printer or need to have the pages printed. 8.5 x 11, you're great to go.