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The app is engineered to deliver rapid, but powerful image capture, facilitated by a great transform function that allows you to pick up the drawing, resize it and move it around the canvas, and a amazing zoom that lets you draw in minute detail.  It allows creativity on the go, anytime, anywhere. equally, advanced artists will find a wonderful buttery, tonal canvas for their life studies, cartoons, abstracts, landscapes and other subjects.  Gesture based drawing interface: Changing the surface area of your finger on the screen controls the focus of the drawing.  Image transformation: Scale/Rotate the image via a simple pinch gesture. 25 Levels of undo/redo.  Supports pressure sensitive drawing on iPhones that support pressure sensitivity.  Image zooming that actually works: Do amazing detail work when zoomed in.  No pixelation of brushes while drawing!  So if you want to put a traditional, but digital sketch pad in your pocket, this is the app for you.  Swipe the undo/redo button to toggle back and forth.  Hold down the button for rapid unwind/rewind.  diese App is a unique and versatile sketch pad.