how do I get the iphone ios unity?

I went on the unity ios page and it doesn't have a download button. It says email sales. It doesn't have much information at all. Is there a trial version of this version of unity? Also, why is it on the desktop unity, I can build to IOS so why would I need the ios unity?

Thanks

When you purchase an iOS license, Unity sends you a serial number that will let you activate your product.

There is trial version of iOS when you tried out the Pro version on Mac. You cannot build iOS apps on a Windows operating system (or Linux for that matter).

The iOS development zone is integrated into Unity so you don't have to change app's. You cannot build to iOS though if you don't have a license. Yes, the button is still there, but it will be grayed out.