The App Store has been gifted with many applications for musicians and aspiring DJs. While many of these apps have their positives and negatives, they all lacked a pivotal use of the accelerometer. GravSynth, developed by KAYAC Inc., sets itself apart from all beat synthesizers in the respect that it doesnâ€™t solely rely on different track pads and arbitrary sound effects. Heck, it only has one specific beat sound. While this may seem like it kills the longevity because it lacks variety, this is definitely not the case with GravSynth. Once you experiment with the magnitude of settings, and how crucial the accelerometer plays in the process, you soon realize what makes GravSynth unique.