If you play a gig in cold or changing weather, then you know what a pain tuning can be, especially when warming up. PolyTune saves mucho time, especially when you are in a hurry to get set up and start playing. Most chromatic tuners do a string at a time, but PolyTune uses the iPhone/iPad/iPod mic to tell it the frequency for all strings (from a single strum). It won't solve your tuning woes completely, but help you get them tweaked faster. Grab it here on the App store for 99 cents (limited time offer until midnight, Dec 19, 2010)!