Hello Guys!
Just an FYI, I bought a used like/new Denon DJ MC6000MK2, plugged it to an iPad/iPhone using Algoriddim DJ, and it worked perfectly fine!
I used a Lightning to USB-3 Camera adapter in order to plug the controller to the iPad/iPhone, and used an iPad/iPhone charger (that needs to be plugged in to the Lightning to USB-3 adapter) in order to power the iPad/iPhone, because if not you will get an error on your iPad/iPhone that the controller pulling too much power form your iOS device…
Hope you guys try it and enjoy it!