saver
//ˈseɪvər//
Noun
saverSingular
saversPlural
1
A person who regularly saves money, especially in a bank or savings account.
She is a careful saver who puts money into her bank account every month.
2
A person or thing that prevents loss, waste, or damage.
This new software is a real time saver.
3
Something that reduces the amount of a particular resource used.
This new showerhead is a real water saver.