北海道ゼロチャレ！家計簿

北海道ゼロチャレ！家計簿 is a household account book app designed to help users visualize their household's CO2 emissions by tracking energy consumption and utility costs such as electricity, gas, kerosene, and gasoline. With simple registration, monthly input, and unique features like meter reading photo capture, family sharing, and comprehensive graphs, users can compare their emissions and energy usage with previous months and similar households in Hokkaido.