Startup Idea : Efficient Ride Planner

Many people don't work in an office, but see clients in various locations such as homes, restaurants, etc. Clients' availability during the week varies. Sorting out the best route is almost impossible for a busy human. Setting up your schedule manually can lead to inefficient routes, wasted time and wasted gas. Real estate sales, delivery drivers, in home nurses, service technicians and many others need help. Can an app help them schedule more efficiently? Imagine being able to put in your clients' availability and location and having the app choose the best meeting time and driving route based on the distance between locations.