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The application has two modes to run: Simulate Car Sharing and Analyze My Driving. Let's see how those look like.
Apparently, there is no real car sharing service tied behind this example application. The simulated car sharing allows you to search and reserve a car in a virtual setup. When you start the application, it always shows a handful of available cars near your current location.
You may change the location to one of the preset locations such as one in Las Vegas as opposed to the current location. Again, there are a handful available cars near the chosen location.
When you unlock your reserved car, you pretend to drive the car until you lock the car again, so that later you can see the score of the driving with the trip route. You may wonder how the driving route was determined. The trick is that the simulator embedded in the application randomly determines the route, depending on the duration between you unlock and lock the car, and determins the driving behavior; or, if the location is one of the preset ones, the sample pre-recorded trip data associated to the location is used. Some of the sample trip data are real driving data by a human which look real, while some others are simulation which look somewhat too good or too bad.
In Analyze My Driving mode, you can analyze your driving. It is irrelevant to the car sharing scenario. You have your mobile phone with you in your car and start the application. You push "Start Driving" button, start to drive, keep driving safely, finish driving, and push "End Driving" button. That's it; so you can see your score and the trip history later. The analysis usually takes a while.