We still use the old meter.
Each month I write down how much we used.
I use an app to fill out the kwh and m3 (gas) plus tell the electricity company how much we used. The electricity company has a different app. I inform them with it online. Hopefully I get some money back. If it probably willnot be too much since I pay 30 euro less from this month on.
In the Netherlands we pay 11 months a certain amount. In the 12th month they check how much you used plus what they already charged you. Is it too less you have to pay extra, is it too much you get that amount back. I consider it as a nice way of saving.
My 12th month is November 8th. This means too I will search for an other company from September on. One that gives me some profit or a bonus.