A free program for Android, by natnag.
OEKAKI SUPPLE30 drawing-tips:
The main purpose of this application is to help beginners to intermediate users to learn how to draw more quickly and easily. There are many illustrations that show the human body from the head to the feet, so that even those who have no previous knowledge of drawing can learn how to draw with ease.
There are illustrations that show the different parts of the human body such as the head, the neck, the arms, the chest, the belly, the legs, the hands, and the fingers.
There are also tips for beginners to intermediate users that help you to understand the basic concepts of drawing such as the line, the curve, and the shape.