A free program for Android, by Udenity.

If you want to learn how to draw, then this application is especially for you. It offers a wide variety of step-by-step lessons. You will find it very easy to get to grips with the material and learn how to draw. The application is suitable for all ages, so you can use it not only for teaching how to draw but also for developing your creativity. You can use the lessons for both boys and girls. It contains lessons for drawing animals, including birds, bears, koalas, and many other things. It’s like having an online course. It contains many interesting pictures that you can use as inspiration for drawing.