Hi! Oh my God, it has been a long time since the last time I wrote something here!
I want to share you about one of applications I use on my phone. It is Line Brush. Have you tried or used it?
This app is simple and I used to draw some pop up ideas with it. I can choose the 'equipment' and colors to add on my drawing and finish them quickly since they are sketches. Here are my first drawings made with Line Brush.
I'll post some others next time!