Thanks to the new Marco Polo app, available for the iPhone, iPad, and iPod Touch, you can now find your hidden device by shouting "Marco!" loudly. It will respond "Polo!," so you know where to look for it. Silently running until you need it, Marco Polo can be customized with 30 different voice options. The input phrase can be customized as well, so you can yell out whatever you want (I vote for "Holy!" "Moly!"). The app is a creation of Matt Wiechec, a designer and developer based in Toronto. "In those moments where we have all lost our phones to the sofa cushions, or left them on the coffee table, or in the bathroom, we now have a fun way to find them again," he says. "It's like playing tag with your phone, just walk around shouting Marco! and your phone will ring back Polo! in another room."