I have done this app, I don´t know how to market it for truck, cars, etc this app automatically record photos of the street, and reproduce them automatically when you drives second time by use of GPS, it helps a lot the drivers that drive along 1 road a lot of times https://itunes.apple.com/us/app/realnavi/id937096976?mt=8 https://www.youtube.com/watch?v=vk28WkC-W6o
marketing an app ASO is a must for marketing the app. Put your all efforts on it. Other than that facebook ads can achieve good results if done properly. Create a buzz on blogs, twitter and other social sites till the app starts gaining some traction. Localization can also play an important part if your app can be used in multiple countries.
