It will save water just like low flow toilets.
I worked for a water department a few years and they got this bright idea to pass out water saving devices.
When we got to the next utility meeting they complained about revenue falling off, so whatever did they do??
Of course, we’ll just jack up the water rates, HURRAH!
Use less for the same price 😡
Yesterday, it took fully four flushes of my low flow toilette to take care of business.