costwatcher
nounUK /ˈkɒstˌwɒtʃə/
US /ˈkɔːstˌwɑːtʃər/
A costwatcher is a person who carefully checks how much things cost.
As a careful costwatcher, she compares prices at three stores before buying anything.
OTHER MEANINGS
2. A tool or app that tracks spending and alerts you when costs go up.
The costwatcher app warned him that his electricity bill was higher this month.
3. A person in a company whose job is to keep costs low.
The company hired a costwatcher to find ways to cut waste.
4. Someone who watches prices to find the best deal.
My dad is a costwatcher who knows every sale in town.