Drehstrom is an iPhone application designed to answer technical questions related to three-phase electrical systems. The app covers topics such as vehicle types, energy requirements, network connections, and charging modes. It offers calculations for charging times and estimates losses in the supply line in euros per year. The app simplifies and speeds up the process of calculating relevant data, presenting all results clearly.

Additionally, Drehstrom allows users to visualize calculated power values in a phasor diagram. It answers questions about cable capabilities, installation scenarios, and the implications of using multiple cables. The app plans to introduce more cable types in the future, emphasizing the importance of compliance with regulations when assessing cable installations.