The paid, ad-free version of the free XnSketch app.
Turn your photos into drawing, cartoons or sketch images in one click to create instant works of art.
Different effects easy to use with full control. Save your creations and share them with your friends through Facebook, Twitter, and Email.
Features:
★ Different effects (black strokes, white strokes, pastel, pencil sketch, color sketch, cartoon, stamp, halftone, hatching, …)
★ Edge strength, and opacity adjustment
★ Contrast, brightness, saturation adjustment
★ Save or share the result with your friends via Twitter, Facebook, Email, …
★ No registration is required, and there are no watermarks, no limitations.
Link: https://play.google.com/store/apps/details?id=com.xnview.XnSketchPro