ElectroMaster App - Electro-technical and Electrical Tool ElectroMaster App, a simple Electro-technical and Electric tool, made for students and professionals of the job. ElectroMaster is divided into three sections: Electrical, Basic Knowledge and Advanced Electrical. In the sections of Electrical and Advanced Electrical there is a practical and a theoretical part, in the Basic Knowledge section there are the main theoretical concepts of electricity. Electrical contents: Ohm's Law Resistors