Electricity: Expert is an iPhone app designed for calculating electricity usage efficiently. The app allows users to determine their electricity consumption by inputting key data. Users can enter the energy cost per kilowatt-hour, specify the number of days for the calculation, select their device from a list which automatically populates the wattage field, or manually input the wattage if needed. The app also enables users to input the quantity of devices in use and the daily usage duration.

This utility app simplifies the process of estimating electricity usage by providing a user-friendly interface and clear instructions on how to use an electricity meter effectively. With features like automatic wattage suggestions and easy data input, Electricity: Expert aims to assist users in managing their electricity consumption effectively.