In today's world the number of the vehicle gets rapidly increasing along with it the price of the fuel(petrol & diesel) are also increasing due to this many types of crime related to fuel (like fuel stealing, fuel tampering) occurs in our country, But now a day's the fuel tampering becomes a major problem. Most of the workers of petrol pumps cheated consumers by showing them the wrong figure of fuel which filled into the tank, Also some fuel pump owners fix a chip inside the fuel machine and by using it they change the original value of fuel and like this, they cheated with the consumer. To overcome this issue we have designed an IoT-based system that will show the accurate value of petrol and its cost (which filled into the fuel tank) on a custom-designed Android app. This app also has an auto-update price feature so whenever we fill the fuel, then it will show its cost based on the price/rate of the petrol that day.