Scribble is a handwriting canvas for school kids: take notes, do your homework, or work through exercises with a pen on a touchscreen.
Write and draw freehand on pages with ruled, squared, music, and other school-paper backgrounds, or import a worksheet as a PDF and write right on it. Hold the pen still after drawing a shape, arrow, or diagram and it turns into a clean version that can be reshaped afterwards, and scribbling over a drawing deletes it.
Made for a pen and a touchscreen used together: the pen draws, and your finger pans, zooms, and selects. A touchpad or mouse works to some degree, but drawing with them is difficult. A built-in Help explains the gestures.
A release for cleaner shapes, and for a busy indicator while documents load.