I check and log my smart meter's readings, every Sunday morning. Gas, electric, water and then feed the reading into a spread sheet, which then calculates the cost of each for the week, based on unit cost, standing charges. Works out the total for the lot, for the week. It then tries to predict the likely annual costing.
The last five weeks of electrical consumption were - £9.47, £9.64, £9.47, £9.47, £9.47. Quite a coincidence. Gas and water vary each week, by quite a lot..