There are many apps for buying used cars, but not all are created equal. Autolist - Used Cars and Trucks for Sale is a mobile app for this purpose, free to install, which offers a huge selection of cars and trucks. The benefit of this app is that it gathers data from several dealerships and car sites in one place, so you can search them all at once. You can see how long vehicles have been for sale, get notifications about prices and see stats on what similar cars sold for. Listings of HD photos are easy to navigate and there?s a detailed filter system.