This is a new drawing made on the iPad using Adobe Ideas. I really wanted to be able to export a final version without using a computer, it almost worked out but I had to set better contrast and did this on my computer. I could have change the contrast on another iPad app, but it would have decrease the size of the picture.Abobe Ideas allows you to send your picture per email as pdf. Everything is in vectors (like in Illustrator)I added a gif below to show the different steps of the drawing process: