It's hard to believe these illustrations were created on an iPhone...

...but this guy manages to create one a day and uploads them to his blog daily. The wonderful images are created using the Sketchbook Mobile or Brushes Apps, and the artist, Kristofer Strom, says "I started drawing these on the bus to and from my studio and thought, 'hey, why not try doing at least one illustration each day?'," he says. "It's very relaxing. Put on some good music and just start drawing."

Source: Creative Review