A free program for Android, by inglesdivino.

Vector Asset Creator: SVG Drawing is a simple and easy-to-use application that helps you to convert any image into a vector graphics for use in illustrations and icon designs. This tool allows you to do a quick and easy conversion with the ability to customize the output file. You can customize the output file to include a variety of different elements, including text, colors, and other objects. 

In addition, you can create your own style and even add your own image to the image you are converting to make your illustration more personal. This is very helpful for creating icons for Android.