A free app for Android, by coolandrodev.

Are you looking for a way to express your creativity and passion for drawing? With Sketch Guru, you can draw on your own photos, or choose from the library of images that you already have on your phone. After that, you can apply the filters and other artistic effects to make your drawing more unique and attractive. You can draw on a blank canvas, or use a pre-made image that you already have.

With Sketch Guru, you can draw with 40+ different artistic effects, such as pencils, brushes, watercolor, oil paint, pastel, colored pencils, pastel color, and more. 

This is a very useful tool for artists and students who want to practice their drawing skills. With this, you can make your own sketches and have fun.