If you’re the proud owner of an Apple iPhone or iPod Touch, then you should check out the newest iPhone app from our good friends at Planet Waves. The Scale Wizard is a complete guitar scale and arpeggio library, with over 10,000 patterns. Features include left-handed view, alternate tunings, the ability to hear ascending or descending scales/arpeggios by swiping your finger on the screen or tap the screen to hear individual notes, multiple positions, and more. A variety of scale types, modes, and arpeggios are featured, including advanced jazz and world msic scales and “big stretch” fingerings for unique sounds. It’s available from the Apple App Store.