The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Lane Media:
Power Chords is a powerful and portable guitar chord reference application.Power Chords offers the opportunity for any musician to explore musical chords to its fullest. All chords have been considered and available as reference and sampling for any musician from the novice to advanced. Power Chords is an indispensable learning tool that can be used by all musicians for their compositions and studies for improving their understanding of chords and musical notation. In addition to guitar musicians, this software could benefit singers in exploring variations in harmony and pitch. Any music composer would find Power Chords valuable in their craft.Power Chords is a powerful study tool - it's perfect for musicians and instructors to better their understanding of how guitar chords should be properly played. There are myriad musical styles in music from classical, Spanish guitar to garage band rock to heavy metal. The common denominator is an understanding of chords in the creation of music. Power Chords benefits all guitar players regardless of their background and music genre.