Businesses for whom location tracking is critical process component and not a good to have such as logistic companies or lets say food/medicine delivery companies who also already have an app deployed with their end agents, the additional cost for them to get location tracking and reporting integrated in their mobile apps is trivial and also there is no technical moat as is there in lets say messaging or SMS APIs ( like Twilio). Either I don't understand your customer set, or problem you are solving is simply not big enough. You are trying to do to location tracking what twilio did to messaging, but reality is location tracking as a service doesn't make a very solid business case here. But best of luck :)