I want to offer a hosted whitelabel GPS tracking solution with an open source tracking server backend. The platform shall be a SaaS web application as well as a mobile app. Each instance should be customizable to a client's own logos and names. I should be able to limit the number of devices the clients have on their instance. If possible, integrate a billing solution.
I would like a detailed fronted with as much functionalities as possible. List what you know is possible and necessary for a GPS platform