Hopefully this is just the first release and some updates are already coming (and fast!).

Unfortunately, at the moment there isn't much "Pro" about this app. You can start with a blank canvas or an image from your device and draw on it with a variety of colors.

For now... that's it. Additionally, the menu is a bit quirky and wouldn't pop up for me via the shortcut about 50% of the time.

I wasn't expecting Adobe Photoshop or anything, but based on the name and price I was sort of expecting maybe MS Paint-like functionality.

My advice would be to hold off on this app until it supports it's "Pro" naming a little better.