Can I use the D1 with an Apple iPhone or iPad?

Yes! You will need an Apple USB 3 camera adapter.  What you would need to do is connect the D1 and its USB cable to the USB A port on the Apple USB 3 camera adapter, and then the male lightning end of the Camera Adapter to your iOS device. You will also need to have a power supply that can power enough to the D1 and your device.  Apple's USB C Fast charger is recommended for this.