The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Bradley Hilton:
Simple Guitar Tuner app is easy and simple in being able to tune your guitar quickly and efficiently for a musical lesson or practicing with friends. This guitar tuner uses a combination of probability theory and Fourier Transforms to provide the best chromatic tuner for string, woodwind, or brass instruments. This specific tuner is aimed at those who play the guitar, you should be able to swiftly and quickly tune your bass guitar and not break any strings. I have sample notes for G String, C String, E String, and A String to ensure speed and accuracy for guitar tuning. Using the guiding notes plus the Auto-Tuner functionality most people tune their guitar in 5-10 seconds with this guitar tuner. So whether you are playing for a rock band, or just learning to play the actual guitar after years of Guitar Hero and RockBand. This guitar tuner will have your guitar ready to go without breaking any strings. New effective Fourier Transform and AutoCorrelation functions to best determine the tuning Frequency with accuracy to 1/100th of a Hz. Now this tuner is the most accurate chromatic tuner of all the apps on the App Store.