Tired of having to rely on Ohm's Law calculator apps? With the DC Tutor app you will gain the knowledge necessary to calculate the Current, Power, Resistance and Voltage of a simple DC circuit, YOURSELF!!!!Are you a car audio specialist or an amateur installer that wants to know how much drain will be put on a cars alternator. With this app you will be able to do the calculations YOURSELF without having to rely on, possibly incorrect, ohm's law calculators or spending extra time searching how to do it. This app is equivalent to the information you would learn during your first semester of electrical College or High School classes. Get a head start on your electrical training or for those DIY electrical guys/gals out there that want to LEARN something, rather than be told the answer.