If you're using an iPad or an iPad Pro with an Apple Pencil, then this tutorial is for you. My most used app for digital watercolor is Tayasui Sketches Pro because it has a very good watercolor brush that looks very authentic.

I also use other apps like Affinity Designer if the type of watercolor look I'm looking for is only available on that app.

Creating vector art on an iPad is now a much better experience with the release of Affinity Designer on the Apple App Store.
I show how I create vector art designs and you can follow along and learn a thing or two.