How does this iOS app communicate over the USB port?
This app promises to turn your iOS device into a second monitor and uses the standard USB cable to connect to the computer, as opposed to the network which all other similar apps use. Back when I heard about it, it wasn't yet available so I thought it was a scam. To my surprise, they released the app and it actually works as described. How does it work ? As far as I know there are no APIs to drive the USB port in iOS, and the computer connected via USB through the standard charging/syncing cable doesn't count as an MFI accessory. Note that they provide the server software (the one that