IOS included in purchase?

Hi, I bought Scrivener below but not via iTunes. I also want to install the app on my iPhone but it charges me 19.95 again and I assumed it would be included? I found some info on your support forum but that says to use the same iTunes account. But I bought it via the improcoder website and a discount code. Can I stil get the phone app? How to do it? Thanks

Mac Scrivener, Windows Scrivener, and iOS Scrivener are separate products. Each requires a separate purchase.

Because iOS software is only sold via the Apple iTunes store, we are not able to offer bundle discounts for it.

Katherine