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Big Medium’s Josh Clark created the exercise schedule that got the world running. The BBC tells the story.

I had a fun conversation with O’Reilly Online Managing Editor Mac Slocum about the differences designing for iPad vs iPhone.

Browse this selection of my writings from around the web to help you unlock the full potential of your iPhone or iPod Touch.

My new book hit shelves the last week of July, and the response has been incredibly gratifying. The book’s climbing the charts and enjoying positive reviews. Exciting!

I wrote the “C25K” training program for new runners over a decade ago. Its philosophy overlaps neatly with my philosophy of software design.