Apple Thoughts: Tune Your Acoustic Guitar With Your iPad

"The Acoustic Guitar Tuner HD (Free) by Amy Faulkner does exactly what its title claims. It is an HD quality guitar tuner that looks and sounds like an acoustic guitar."

The purpose is to allow you to tune your own acoustic guitar, and this iPad HD app does just that apparently. I don't know anything about tuning a guitar, let alone how to play one so I'll have to leave this to those that do. And the reviewer, who in fact does tune his own guitars, said it was pretty darn good. Worth a shot and it's free so no loss if you don't like it.