I just downloaded the app, and you can save pictures. You have to press the upload button AGAIN instead of the done button. The paint interface is good, but I can't seem to find a paint selector (from picture) tool. Also the GUI (Graphical User Interface) is hard to use because when I'm trying to draw, I hit the reset button.
CONSPIRACY THEORY:
There's another app by the same description and features as this one. Both apps were posted to the appstore on the same day...