>>37437273I use an app called sketch. And no tools, just my hands.
When sketching on my phone I tend to zoom the picture in really close and tend to start things off with a really rough sketch of what I want to draw, not unlike how I go about it on paper (here's my rough outline I did when I started the bulbasaur drawing to give you a sense of how it kinda started out)
The great thing about an app like sketch is, for a free app, you get a ton of choices for brushes, layers galore, and can make custom canvas' which can be great!
I think the best advice I could give is play around. Try holding the phone different ways or different distances from yourself. Maybe sketching one way feels more comfortable that others. Just gotta get into a rhythm and practice!
It's defimitely not a medium for everyone but I think it's a useful one to see if you can get it to work