Mileage Keeper is a free iPhone app that helps you track your vehicle's fuel economy, ultimately helping you save money. With its simple and user-friendly interface, this app makes it easy to keep tabs on your fuel consumption.

To use Mileage Keeper, all you need to do is enter your odometer reading and fuel amount for each refueling. The app will then calculate your fuel economy and track the cost per gallon (or litre) as well as the total amount spent on fuel for each vehicle. You can also add notes for each refueling to remind yourself of any changes in your driving habits.

One of the standout features of Mileage Keeper is its flexibility in unit measurements. You can calculate fuel economy in MPG(US), MPG(Imperial), km/l, l/100km, km/Gallon(US), km/Gallon(Imperial), or Miles/l. Fuel amounts can be entered in Gallons(US), Gallons(Imperial), or Litres, and distances can be entered in Miles or Kilometres. The app will perform all necessary conversions for you.

Additionally, Mileage Keeper supports the import and export of data through email using standard .CSV files. This feature allows for easy backup and transfer of your fuel economy records.

With Mileage Keeper, you can track the fuel economy of multiple vehicles, making it a convenient tool for families or individuals with multiple cars.

Overall, Mileage Keeper is a useful and free app for anyone looking to monitor their vehicle's fuel economy and make more informed decisions about their driving habits.