GAS RATE CALCULATOR FREE is a utility app developed by COOPERSOFT. It is a free app available for Android devices that helps calculate gas rates for natural gas supplies in seconds. The app is easy to use and requires users to enter metric meter readings and press calculate.

The app comes with a built-in timer and alarm that alerts users when it's time to take the second reading, which is 120 seconds after the initial reading with the appliance under test full on. The results are then shown in cubic meters per hour, cubic feet per hour, BTU per hour, and KW per hour. The app also provides instructions in the help file. Overall, GAS RATE CALCULATOR FREE is a convenient tool for those who need to calculate gas rates quickly and accurately.