Chalkpad is a drawing and coloring application.
Within this application you can use your iphone or ipad as a chalkboard.
It can also be used as a graphics paper or mail. You can adjust the thickness of lines and colors.
You can detail your drawings with the help of zoom in and zoom out functionalities and use your screen in a more effective manner.
Your drawings can be saved and used in the future.
Have fun with this application and enjoy yourself.