Yaskawa’s Savings Predictor application, which estimates energy savings when using a variable frequency drive instead of conventional volume control methods, is now available on Apple iTunes for iPhone (OS 3.1.2 or later) and iPod Touch. Variable frequency drives are reliable electronic devices that control three-phase electric motor speed. They’re used in building automation, industrial, pumping, agriculture, irrigation, and water/wastewater applications to control the speed of fans and pumps in various systems. The payback period for installing drives is usually less than 3 years and can be less than 1 year. This mobile application from Yaskawa, a producer of variable frequency drives, machine controllers, servo amplifiers, and servo motors, can help owners determine the payback period for variable frequency drives by estimating energy savings.