Using paint on Windows, I can edit images and also draw freehand. The default image editing application on Android doesn't support freehand.
I need software that will enable me draw freehand on Android.
Try this one SketchBook Mobile Express. It is harder than drawing on your pc, but if you have a tablet is a great option.
From their about section. Feautures:
Here is a version of the same application for Tablets: GooglePlay