[kriro]

I've never thought about this because I don't even own a car anymore. Essentially it's a device that converts diagnostic data to a standardized format (and displays this in a corresponding app)? +now you can use the data in your own apps

Is the app required or is there a device that I can plug in, read data for a while, unplug and get the data to a desktop (like a usb key)...because that would be interesting for me. Anything with a mobile connection...scares me :D

[burger_moon]

Data logging software has been around for a long time that does exactly that. Some quick searching for your car should turn up some results.

[kriro]

Yes I searched for it and there seems to be plenty of stuff for specific manufacturers or models but I didn't find anything that is universally useful and converts everything to a unified JSON or XML format. Sorry if that wasn't clear. And like I said I don't own a car :D