Video: TC PolyTune iPhone App

My iPhone has saved me at gigs so many times by providing a guitar tuner when I leave mine at home. Now TC Electronic has released their award winning PolyTune tuner as an iPhone App and it's only 99 cents until December 19! For 99 cents, it's totally worth it!Update: Since I learned about this app on the Line 6 forums, here's my quickie review that I posted there.I downloaded the PolyTune app and when I buy any new tuner, I line up all of my favorite tuners and see if they all agree. The PolyTune worked really well for an iPhone App. It did the thing where you strum all the strings together and you can see which strings are sharp or flat. Then you can pick an individual string and it reverts to a more traditional needle-style display. It worked very well and my guitar sounded in tune in no time.The downside is that it didn't quite agree with my other tuners. While it claims an accuracy level of +-.5 cent, it seemed like one of those tuners that's "generous" about tuning and reads "in tune" when it's really just pretty close. On 4 out 6 strings, my Peterson and Korg were reporting the notes were as much as +- 3 to 4 cents off. The Peterson and Korg tuners seemed to agree on most strings but the PolyTune was the odd tuner out. I've tested my Korg and Peterson tuners to some pretty nice reference strobe tuners so I tend to trust them at this point. So I guess what I'm saying is that the PolyTune seems a bit less accurate but still got my guitars pretty much in tune. I wouldn't really trust an iPhone app to tune at a gig unless I leave one of my trusted tuners at home but for 99 cents, I think the PolyTune works well for what it is.