Tapio comes with Apple's Lightning to USB Camera adapter or USB-C adapter.
Tapio is a native USB switch interface that can be connected to an Apple iOS device using an Apple USB camera adapter.
It accepts industry standard 3.5 mm stereo or mono plugs, and directly interfaces up to two adaptive switches to an iOS device or computer. Tapio is powered from the device, and does not require external power.
A note of compatibility:
Since Tapio presents itself as a USB keyboard, you will see this message. Simply tap OK directly or scan to and "tap" OK to dismiss the dialog box.