A few things...

I love using this app for all my digital art, but there are a few things I think would make this app better. First of all, it would be better and easier with thinner tools. The pen is ok, but not very smooth. And the airbrush is nice, but has a few problems. If it is black and too dark on a certain colour, and I try to turn it down just a little more, it turns red or green. And it is not at all smooth. Looking at other drawing software, the shading is so smooth and nice, flawless. But this one needs work. Oh and one last thing, the pen size metre always glitches and wont go to the size I want it to. I would love to see these changes in the next update, thankyou!

Totallyfun1000 about You Doodle - draw on photos, v6.2.2