A free program for Android, by TruckersReport.com.

This is one of the best truck maps and GPS navigation apps out there. If you need to plan your next truck run or your route to a job, Hammer is a must-have tool for you. Not only does Hammer track and route, but also includes an in-car Wi-Fi hotspot, so you can use Hammer on your phone while driving and on your truck.

This app is 100% free to use and will continue to be free. You will never have to pay to use this app.