I can't tell which way your screen is pointing. For even more fun, try this out on a device like a phone or tablet.
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Ah, the sundial. One of the oldest, simplest devices for measuring the passage of time. A triumph of human ingenuity. And yet, using a sundial can be a frustrating experience. Is it cloudy? Good luck! Are you indoors? No chance! Worst of all, the Earth itself is in the way all night.
The Mobile Synthetic Sundial solves these problems by using a vast technological infrastructure—from GPS satellites to the tiny gyroscopes inside your phone—to simulate the shadow of a stick protruding from the center of your screen.