Where do I donwload Unity iPhone?

I have just bought Unity iOS and received the software serial number. But I can't seem to find the download link to Unity iPhone. I downloaded the free version of Unity and inserted the license number but I can't see any remarkable difference to how it looked before I inserted the code. So my simple question is, where do I download Unity iOS? Or is it integrated with the standard software?

It's integrated with the standard software. In the build settings, the option to build to iOS should no longer be grayed out.