aCar is a free app that lets you track the fuel mileage and costs, maintenance, and general expenses of your vehicles. You can also separate business and non-business mileage, so this app might be a useful tool for you.

You can download this app for free, but you can donate and go pro, which will give you additional features such as manual data and settings automatic backups and restore. It is surely nice to have a handy app for your car’s records, right?