Can I use the D3 with an Apple iPhone or iPad?

Yes! You will need an Apple USB 3 camera adapter.  All you would need to do is connect the D3 and it's USB cable to the USB A port on the adapter and then the male lightning end of the Camera Adapter to your iOS device. You will also need to have a power supply power enough to power the D3 and your device.  Apple's USB C Fast charger is recommended.