So I've been compelled to get back into digital painting recently, though unfortunately I've lost the pen for my tablet. Seeing as I can't afford to buy a new set up I've resorted to free painting apps on the iPhone. The one I've found best is Brushes
and if you have some spare cash, the paid version has nifty little features like layers (a la Photoshop). Alas, i am a cheapskate and will stick to the free version, which isn't that bad. Switching between bruch options to change the brush size/opacity is a little bit of a pain, but it's free, so fuck it.
Initial attempts were piss poor as I was relying on my imagination. I'm currently using references for portraits (the main reason I digitally paint anyway) by using phone for painting with my laptop displaying the image, which seems to be working really well, and I'm getting the hang of finger painting now. Here's a couple of portraits done after a sleepless nights practice.
In short, the app is great seeing as it's free and I recommend to anyone who is poor/cheap and wants to try digital painting.