In the "bit Time Lab" me and my colleague Daniele Teti have developed an app to control a car via bluetooth with Appmethod, for Android and iOS (released soon) with the same codebase.
The main topics covered by the team are the multitouch UI and the bluetooth hardware interface using a true native app (no VMs, no scripting, no compromises). Below the picture of the app and the cars used.
The most interesting note was the time: we spent 7/8 hours to develop and build the entire system!
This project will be shown at the Rome Codemotion.
Here the video presentation of this project by bit Time Lab