The National Grid ESO App is a free Android application developed by NATIONAL GRID ELECTRICITY SYSTEM OPERATOR LIMITED. The app enables users to monitor the generation types that make up their electricity supply and see when the cleanest time to use electricity will be. It also allows users to see the carbon impact level of electricity generation, how their region compares to others in GB, and be notified when a record towards decarbonisation breaks.

National Grid ESO is a legally separate business within the National Grid Group that relies on a mix of generation to balance the system and ensure that electricity is always there when needed. The app is designed to help users understand their electricity supply better and support the transition to a more sustainable energy future.

However, the app lacks some essential features like the ability to control or manage your energy usage. The app is only informative and does not offer any interactive features. Also, the app is only available for Android users, leaving iOS users out of the loop. Despite these drawbacks, the app delivers on its promise of providing users with crucial information about their electricity usage and is an excellent tool for those interested in reducing their carbon footprint.