Theremins with softsynths

I have an ipadpro . I have an app called Aparillo. Also have factory and animoogz apps. Is it possible to use a theremin as a controller with these apps .
I saw Daniel fisher of sweet water sound using different theremins to control effects, guitar and software synths. Just wasn’t exactly sure how he did it and
Thought maybe he was using a laptop instead of an ipadpro. Thanks I haven’t had any experience with this application but was wondering if anyone here on the thereminworld forum had any experience with this thanks

A theremin would compliment Aparillo. I’ve never heard anything like Aparillo. It’s used by film composers. A theremin with Aparillo would be like peanut butter and jelly.