Here are some views of my neighborhood at night - I decided to park my car and sketch what I saw out of my window since it was too cold and dark to paint with watercolors. I remembered I had Brushes app on my iPhone, so I used that to experiment.
I've had this app on my iPhone for a while, but I still find it tricky to use. I played with some drawing apps on iPad, too, but it seems my lines don't show up on the screen as fast as I can swipe. Capacitive technology used for touch screen is not as fluid as I like compared to pressure-sensitive screen like on a Wacom tablet.
Do you have any tips on iPhone/iPad sketching? Some people suggested using an app called Paper, and it seems like iPad will be much better for sketching due to its larger surface.