EVO 4 is compatible with iOS version 6.0 or later on devices with either a lightning port or a USB-C connector.
If connected to an iOS device with a lightning port, you will need to connect the EVO 4 to an active USB hub to provide 5v USB power and connect this to the iOS device using an Apple Camera Connection Kit.
If using a iOS device with a USB-C connector, you can simply use a USB-C to C cable to connect it directly.
Please note that due to limitations on iOS, the Loop back functions of EVO 4 are not available on iOS devices.