The problem is you can't *see* the detail you are drawing if you have a big fat finger trying to do it.
Use your little finger instead. You can see the detail with big or little fingers. Fat fingers?
That's a cop-out. If you can draw, you can draw on an iPhone/Touch with any fingers. Try it. I have MyPaint, Fingerpaint and may buy Brushes. They're easy to use, but you need the same kind of skill to get good results as you would with a real paint brush.
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