I need to develop a programm that is going to read some information from a special USB device and access information via Web Socket (socket.io preferred). My client wants to deploy this app on Mac OS X, Windows, Android and iOS.

I was looking for development softwares valid for both: Desktop and Mobile, but it is still not clear for me and that´s what I found.

• Unity - Looks very good but to create a native plugin for reading from the device it lloks like I need the PRO edition.
• Adobe Air - Looks good but I´m not sure if I can write Native Plugins for all wanted platforms.
• LiveCode - Still inmature (lots of bugs) and I don´t know if it is possible to write native plugins for my device.

Is there any other good platform for my case? What´s your option?