One of the great things about mobile devices like the iPhone is that not only does it save us from having to carry around endless gadgets, but it also allows us to be creative during times we didn’t think was possible. The items below, such as the tuner or on-the-go piano save you the hassle of finding and bringing along your tuner or jamming out that new idea while riding shotgun on a road trip. Whatever the occasion may be, the iPhone/iPod/iPad applications below will increase the productivity of any musician or songwriter looking to accompany the fast pace life of a 21st century musician.