Topic: Import Custom Content on iPad

I am wondering if there is a way to import custom content on an iOS device. I was able to import the "All Content" option from this website without issue; however, when creating content on the Content Creator it downloads the file, but does not allow me to import it on the app.

I did notice the Content Creator specifically states this is for Android devices, so it may not be possible on iOS. I am just looking for confirmation.