Best Free Tuner - Acoustic Guitar

I use the app to tune my Acoustic Guitar. I primarily use the iPhone version of this app, but the OSX version has been working just as well for me. I find the interface for the OSX version is a little more simplistic; I actually prefer the more sophisticated interface of the iPhone version. However this OSX version manages to detect when my guitar is in tune just about as well as the iPhone version. I should also mention that INSTuner offers the most precise feedback of all the other tuners I have tried on the app store. I think it’s a very well designed app and it does exactly what I need it to.

Skykid14 about insTuner - Chromatic Tuner for Guitar, Ukulele and String Instruments