Re: It won;t help
Being retired and reclusive, I'm free to timeshift my day. In winter 2008/9, I did this to see how much money I could save.
My all-electric house is on the Economy 7 tariff so I got up at 1am, lunched at 7am and went to bed at 5pm. The novelty soon palled, though I did still get to be awake during the daylight hours.
I won't weary you with the details of every pettifogging economy I used, but I pretty much halved my bills. Mostly this was down to using the juice during the seven-hour period in which the cheap night rate applied.
The moral is that extreme economising is no fun and you don't need a smart meter for it.
I run an Excel workbook that records my meter readings, analyses them for usage and pricing trends, and predicts my bills to the penny. That's the only tool I need.