OBD2 device for fuel economy

[SamWitwicky]

Hello.
We are working on a new OBD II tracker/scanner. Our device is almost finished but we still have time to add new functions or change some of the existing ones. I want your advice to make it better if it is interesting for you to participate in the process of creating a new device for your car.
Main functions of the device:
- reads engine error codes;
- shows the data from dashboard indicators;
- real-time 24/7 vehicle monitoring;
- location tracking;
- notification when vehicle enters or leaves a geo-fence;
- driver's behavior analysis;
- accident notification;
- 3d reconstruction of the accident;
- mobile application;
This device will help you to economize fuel. It shows rapid accelerations and you can correct you driving habits to economize fuel.
Which other functions would you find useful? What functions do you think are unnecessary?
I will be thankful for any ideas. Feel free to say what you think.