This app is part of the Youless energy monitor product. It connects directly to the Youless energy monitor model LS110 or LS120, and provides a real-time display of current energy consumption and / or energy generation.
In addition, it can be used to go back in time using the internal log of the Youless. Firmware updates/changes can also be made from the app.
Visit https://www.youless.nl for more information.