Is it possible to conditionally display a start form control in nintex mobile?

I have a NWC start form with a geolocation control.

I want to modify the control visible property to be conditional that the form is being loaded in nintex mobile rather tha in a web browser.

I had a look through the functions but cannot see a 'isNintexMobile' ('isMobileApp') similar function or context.

Also I checked out form rules but could not see a way to do it via that method either.