This is by far a much better painting app than all those doodlers for the iphone. Here's what I drew in 5 minutes. It's so easy to use, has all the core functionality you need. No need eraser (infinte undo and redos)... and even an eyedropper (that's VERY nicely implemented). The best part that I liked was the opacity. It's just great. The menus are nicely laid out, the controls are hidden when you start painting. It's pretty smart the way it works. Tapping on the bottom will make the controls show up, just as intuitively as you'd expect. No need to read instructions or anything like that. It's very very easy to use. I think all iPhone apps should try to remember about the fact that we are mobile users... and we want things easy to use. And yes, you can Pinch to zoom in zoom out. Just as you would expect. The gallery interface is exactly like the photo gallery from the default apple app. If you are an artist or someone who likes to paint or sketch on the go... I highly highly recommend this app.