Hi Tom,
If you check with Audient, they will tell you that ONLY the ID4 is iOS compatible to work with an iPad or iPhone.
They will also tell you that the ID14, ID24, ID44, etc., are made to work ONLY with a PC or a Mac. The 14, 24, 44, etc., require special drivers and/or software to access and control the extra features and functions built-in to them.
Likewise, Cubase requires a PC or Mac.
That’s why they only provide a code for Cubase.
An iPad requires an interface which is USB Class compliant, such as the ID4.
I hope that helps clear up the confusion.
John