Persistence of vision app for the iphone

Light Writer is an iphone app that displays flashing lights in order to create a persistence of vision effect. It allows you to write messages or images in the air with a wave of the hand. It sounds like a great way to quietly send a message to anyone in sight. I imagine it would only be effective in pretty dark conditions ,but I’m betting we haven’t seen the end of this app. It could be big. Available here via itunes.

(via crunchgear)