Are you saying that you have 22 different devices each controlled via a WiFI controlled socket and an app?
The ones you plan to use in future, dual channel, report your energy usage. But that's no god if you don't do anything about it.
You say ROI is not important, but you are trying to save a few units of electricity using gadgets which costs Bht 399 each
In UK they talk about Smart Meters will save you energy, but only if you reduce your consumption accordingly.