I’ve tried a lot of these special effect multi-touch demo apps—Ambient Mood Lamp (sucks), Supernova (2 seconds of amusement)—but none of them have come close to the pure magic that is Uzu. It’s a dazzling display of colours, totally interactive to the touch (use all 10 fingers), that serves no other purpose than to ‘wow’.
Says developer Jason Smith:
Technically speaking, Uzu is a kinetic multitouch particle visualizer. Really it’s a sort-of math-physics-art-toy for anyone who ever loved spirographs, fireworks, planetariums, lava lamps, light sabers, pen lasers, tesla coils, christmas lights, or graphing calculators.
Points of light will shoot across the screen and fly to your command, twirling in a vortex of color and motion. Freeze and move Uzu in 3d space while contorting spirographic curves with your fingers. Uzu lets you quickly switch between 10 different modes of real-time animation by simply changing the number of touches you’re using. You can spend countless hours discovering the many unique ways of playing and interacting with Uzu.
When I saw this app, I knew writing about it would be useless. Even that screenshot up there doesn’t tell half the story. You’ve got to see it. So either buy the app for 99¢, or watch this video demo: