This is just incredible. Sure David Hockney's iPad digi-art is pretty good, but this effort from David Jon Kassan is simply mind blowing.

Using a live model who posed for 3 hours, Kassan knocked up the brilliant life-like portrait using nothing more than the Brushes iPad app, which costs just £2.99, and his incredibly talented hands.

Nothing more to say really, just watch the video and be amazed.