I've had an " Owl " energy meter for many years. A doddle to fit the current monitor in the meter cabinet and that sends the meter readings and to a freestanding display in the lounge. I've got it set to display cumulative KWH on a weekly basis which resets at midnight each Sunday. If I bother to input the tariff it can show costs and lots of other variables.
But can't say its high on my list of propiorities (and by extension, many other peeoples priorities)