에챌, also known as echal, is an app designed to visualize daily energy consumption and assist in developing energy-efficient habits. Users can analyze their household energy consumption in detail, from real-time usage to estimated costs, comparing with neighbors, and tracking usage over time. The app offers engaging energy challenges where users can actively participate, earn G points, and contribute to saving the planet.

Additionally, users can share energy-saving tips with neighbors through the energy tip board, fostering a community of eco-conscious individuals. 에챌 aims to raise awareness about energy consumption and promote sustainable living practices through its user-friendly interface and interactive features.