NiceDraw lets less experienced artists use a photo as template for their own drawings.
The unique feature is the slider, which allows you to change the brightness of the template quickly, to achieve a good visibility of template and your own drawing.
The slider is always accessible, as the brightness is often changed during drawing.
You will be surprised how nice your own drawings will be.
Features: pen colors and thickness, zooming, save to photo album, load photos from album, undo