Fill tool needed

I look over this app, its totally what you need if your doing fan art, drawing ideas, or just for fun! I like how there are many different tools and stamps and stuff, but the one tool I think needs to be added is a fill tool. I think its hard when you want to color something but you already did the sketch. But its a really cool app and I highly suggest it if your just looking for an app to draw on.

Abbys Beanie about Drawing Desk:Learn to Draw App