This application was created with the aim to give our customers a technical support to perform calculations within the electrical system. It is not a professional tool but only quantitative, it is not a substitute for professional software, or the recommended methods of calculation by the rules. Despite this background can be a valuable help to solve some calculations with a certain speed and with the aid of only one phone. The calculations are that it can play, current calculation, calculation Apparent active reactive power, design of earthing system, Maximum cable length determined the load as well as referrals for contacts of our company.