A free app for Android, by Peli Ngacengan.

If you want to learn how to draw, but you have no idea where to start, you’ve come to the right place! One of the techniques in starting to draw is by imitating an existing image. With this app, you will get access to a collection of amazing sketches that you can try to imitate. These are images of various objects, characters, body parts, and more. This app is also great for those who are searching for cool ideas to draw.

So, let’s get started! Don’t worry if the results are not as good as you want. You will improve with more practice.