How about simply taking shorter shower vs restrict the water flow.
That would suck, even more than restricted flow heads IMO.
I don't do short showers, unless I'm in a big rush.
Also remember 2.5 gallons per minute is actually a fair amount of water. It makes for a pretty strong shower. Not super strong, but moderately strong. Are you sure you don't just have a flow issue?
Also, PSI alone is not enough. Are your pipes sized correctly for the length? Cuz if the pipes are undersized for the length, by the time the water reaches the shower head your flow will be much less.
My water bill is 100-150 every 3 months. How much are you really saving with these "water saving devices".
If you water your loan or wash your car all that goes out the window anyways.
Water is dirt cheap and plentiful (at least where I live). There is very little savings to be head (from what I find)
Water is a bit expensive here but...
Depending on where you are and what you read, a low flow head can save roughly $20 or more per person per year. So for a family of four, that's about $80 a year.
But yeah, we have an in-ground sprinker system, on a huge lot, so my water bills are huge. Several hundred per month in the summer, so the sprinkler system expenses drown out any shower head savings.
However, like I said, I'm thinking my 8x12 rain head might be higher than 2.5 gpm because it seems stronger than I was expecting.
The other thing to remember is to buy shower heads that max out the laws. There are a lot of shower heads out there that do 2 gpm or less. Or else buy a shower head where you can remove the flow restrictor if you really want.